"Versuche und Entwicklung" [Research and development] (in German). Switzerland: Department of Defence. Archived from the original on 2020-09-25. Retrieved 2020-04-04.
Park, Alice F.; Swain, Douglas S. (1967). "Direct Moulded Sole Boots"(PDF). Defense Technical Information Center. Technical Report 68-20-CM. Clothing and Materials Laboratory, United States Army Natick Laboratories. Archived(PDF) from the original on February 11, 2017.
"Civil Air Patrol Uniform Manual"(PDF). Civil Air Patrol National Headquarters. 23 March 2005. Archived from the original(PDF) on 2011-07-17. Retrieved 2011-01-28 – via The Hock Shop.
"Skor" [Shoes] (PDF) (in Swedish). The Nordic Museum. Archived from the original(PDF) on 2007-10-30. Retrieved 2008-06-07.
"Versuche und Entwicklung" [Research and development] (in German). Switzerland: Department of Defence. Archived from the original on 2020-09-25. Retrieved 2020-04-04.
Park, Alice F.; Swain, Douglas S. (1967). "Direct Moulded Sole Boots"(PDF). Defense Technical Information Center. Technical Report 68-20-CM. Clothing and Materials Laboratory, United States Army Natick Laboratories. Archived(PDF) from the original on February 11, 2017.
"Civil Air Patrol Uniform Manual"(PDF). Civil Air Patrol National Headquarters. 23 March 2005. Archived from the original(PDF) on 2011-07-17. Retrieved 2011-01-28 – via The Hock Shop.