Personal flotation device (English Wikipedia)

"The Naval Chronicle Volume IV". Feb 1802. Retrieved 2019-09-02.
"The Sporting Magazine". October 1804. pp. 149–150. Archived from the original on 2010-09-25. Retrieved 2019-07-28. It consists of two simple pieces of cork, placed in such a manner on the human body, as to assist it in swimming either on the back or belly at will...
Ingersoll, Ralph (1940). Report on England, November 1940. New York: Simon and Schuster. pp. 147, 158.

boatus.org

"Doggie Life Jackets and Flotation Devices". Boat US Foundation. Archived from the original on 7 April 2014. Retrieved 6 April 2014.

"Safety Aids" (PDF). Archived (PDF) from the original on 2018-04-30. Retrieved 2017-04-05.

Horsfall, Cindy. "Canine Flotation Devices". International Association of Animal Massage & Bodywork / Association of Canine Water Therapy. Archived from the original on 7 April 2014. Retrieved 6 April 2014.

"Sea Kayaker: Deep Trouble by Matt Broze and George Gronseth". 5 May 2010. Archived from the original on 4 March 2016. Retrieved 23 April 2017.

"Captain Eric 'Winkle' Brown CBE DSC AFC RN - Maritime Foundation". www.maritimefoundation.uk. 21 February 2016. Retrieved 2023-01-03.

"The bravest man in the RAF never to fly an aeroplane". Archived from the original on 22 October 2017. Retrieved 23 April 2017.

"Mae West Crashes Oxford Dictionary". St. Petersburg Times. Vol. 60, no. 13. INS. 6 August 1943. p. 15. Archived from the original on 26 April 2016. Retrieved 29 June 2015.

"USN Life Preserver Belt". www.theoverlordcollection.co.uk. Retrieved 2023-01-04.

"Feature - Survival Science". Archived from the original on 16 May 2017. Retrieved 23 April 2017.

"The Sporting Magazine". October 1804. pp. 149–150. Archived from the original on 2010-09-25. Retrieved 2019-07-28. It consists of two simple pieces of cork, placed in such a manner on the human body, as to assist it in swimming either on the back or belly at will...
"Feature - Survival Science". Archived from the original on 16 May 2017. Retrieved 23 April 2017.
"Sea Kayaker: Deep Trouble by Matt Broze and George Gronseth". 5 May 2010. Archived from the original on 4 March 2016. Retrieved 23 April 2017.
"The bravest man in the RAF never to fly an aeroplane". Archived from the original on 22 October 2017. Retrieved 23 April 2017.
"Mae West Crashes Oxford Dictionary". St. Petersburg Times. Vol. 60, no. 13. INS. 6 August 1943. p. 15. Archived from the original on 26 April 2016. Retrieved 29 June 2015.
"Safety Aids" (PDF). Archived (PDF) from the original on 2018-04-30. Retrieved 2017-04-05.
"Doggie Life Jackets and Flotation Devices". Boat US Foundation. Archived from the original on 7 April 2014. Retrieved 6 April 2014.
Horsfall, Cindy. "Canine Flotation Devices". International Association of Animal Massage & Bodywork / Association of Canine Water Therapy. Archived from the original on 7 April 2014. Retrieved 6 April 2014.