Ladder (English Wikipedia)

"Why is walking under a ladder supposed to be unlucky?". HowStuffWorks. 6 August 2015. Archived from the original on 8 November 2020. Retrieved 25 November 2020.

hse.gov.uk (Global: low place; English: 6,559^th place)

Health and Safety Executive, HSE (January 2014). "Safe Use of Ladders and Stepladders-A brief guide" (PDF). hse.gov.uk. Archived from the original (PDF) on 13 July 2018. Retrieved 22 June 2018.
"Safety in the selection and use of ladders" (PDF). Health & Safety Executive. Archived from the original (PDF) on 18 November 2012. Retrieved 17 May 2014.

imdb.com (Global: 22^nd place; English: 33^rd place)

King, Jack (13 January 1939), Donald's Lucky Day (Animation, Short, Comedy, Family), David Kerman, Dorothy Lloyd, Clarence Nash, Paul Norby, Walt Disney Productions, archived from the original on 5 May 2021, retrieved 25 November 2020

livescience.com (Global: 1,726^th place; English: 1,417^th place)

Wolchover, Natalie (19 September 2011). "The Surprising Origins of 9 Common Superstitions". livescience.com. Archived from the original on 27 November 2020. Retrieved 25 November 2020.

techdivetools.com (Global: low place; English: low place)

"Diving Equipment Specialties". Techdivetools.com. Archived from the original on 7 December 2013. Retrieved 5 March 2014.

uspto.gov (Global: 2,155^th place; English: 1,380^th place)

"Patent and Trademark Office Notices". Uspto.gov. Archived from the original on 1 June 2013. Retrieved 5 March 2014.

web.archive.org (Global: 1^st place; English: 1^st place)

"Diving Equipment Specialties". Techdivetools.com. Archived from the original on 7 December 2013. Retrieved 5 March 2014.
"Patent and Trademark Office Notices". Uspto.gov. Archived from the original on 1 June 2013. Retrieved 5 March 2014.
"Collapsible Platform For Maintenance Tasks – Patent 7204343". Docstoc.com. 27 September 2010. Archived from the original on 5 March 2014. Retrieved 5 March 2014.
"Workplace Solutions: Preventing Worker Deaths and Injuries from Contacting Overhead Power Lines with Metal Ladders". National Institute for Occupational Safety and Health. September 2007. doi:10.26616/NIOSHPUB2007155. Archived from the original on 28 May 2015. Retrieved 16 January 2015. {{cite journal}}: Cite journal requires |journal= (help)
"Metal Rubber Feet for Ladder Prevents Slipping" Popular Science, April 1936 Archived 2017-03-27 at the Wayback Machine article at bottom left of pg 499
Health and Safety Executive, HSE (January 2014). "Safe Use of Ladders and Stepladders-A brief guide" (PDF). hse.gov.uk. Archived from the original (PDF) on 13 July 2018. Retrieved 22 June 2018.
"Safety in the selection and use of ladders" (PDF). Health & Safety Executive. Archived from the original (PDF) on 18 November 2012. Retrieved 17 May 2014.
"Why is walking under a ladder supposed to be unlucky?". HowStuffWorks. 6 August 2015. Archived from the original on 8 November 2020. Retrieved 25 November 2020.
Wolchover, Natalie (19 September 2011). "The Surprising Origins of 9 Common Superstitions". livescience.com. Archived from the original on 27 November 2020. Retrieved 25 November 2020.
Brown, Marc (1 November 2003). Arthur and the Bad-Luck Brain: A Marc Brown Arthur Chapter Book 30. Little, Brown Books for Young Readers. ISBN 978-0-316-12650-2. Archived from the original on 23 March 2023. Retrieved 26 November 2021.
King, Jack (13 January 1939), Donald's Lucky Day (Animation, Short, Comedy, Family), David Kerman, Dorothy Lloyd, Clarence Nash, Paul Norby, Walt Disney Productions, archived from the original on 5 May 2021, retrieved 25 November 2020

Ladder (English Wikipedia)

americanladderinstitute.org (Global: low place; English: low place)

books.google.com (Global: 3rd place; English: 3rd place)

cdc.gov (Global: 251st place; English: 248th place)

docstoc.com (Global: low place; English: 7,198th place)

doi.org (Global: 2nd place; English: 2nd place)

google.com (Global: 109th place; English: 87th place)

howstuffworks.com (Global: 1,354th place; English: 958th place)

people.howstuffworks.com

hse.gov.uk (Global: low place; English: 6,559th place)

imdb.com (Global: 22nd place; English: 33rd place)

livescience.com (Global: 1,726th place; English: 1,417th place)

techdivetools.com (Global: low place; English: low place)

uspto.gov (Global: 2,155th place; English: 1,380th place)

web.archive.org (Global: 1st place; English: 1st place)

books.google.com (Global: 3^rd place; English: 3^rd place)

cdc.gov (Global: 251^st place; English: 248^th place)

docstoc.com (Global: low place; English: 7,198^th place)

doi.org (Global: 2^nd place; English: 2^nd place)

google.com (Global: 109^th place; English: 87^th place)

howstuffworks.com (Global: 1,354^th place; English: 958^th place)

hse.gov.uk (Global: low place; English: 6,559^th place)

imdb.com (Global: 22^nd place; English: 33^rd place)

livescience.com (Global: 1,726^th place; English: 1,417^th place)

uspto.gov (Global: 2,155^th place; English: 1,380^th place)

web.archive.org (Global: 1^st place; English: 1^st place)