The Shipton Photograph (sources)
- The Mount Everest Reconnaissance Expedition 1951, by Eric Shipton, 1952 Hodder and Stoughton, London, England. NOTE: This was likely published before the Popular Science article in December 1952, and therefore was likely the source for many details in that article. Pg. 18, 21-22, 54, 55, 127, 128. Online: https://archive.org/details/mounteverestreco00ship/page/53
- "The World's Most Mysterious Footprints," by Gardner Soule, article in Popular Science, December 1952. Pgs. 132-136, 242, 244. Online: https://books.google.com/books?id=mSEDAAAAMBAJ&printsec=frontcover#v=onepage&q=%22strange%20tracks%20are%20about%20foot%20long%22&f=false
- "The 'Abominable Snowmen' of Mount Everest," by Eric Shipton, article in the San Francisco Examiner, newspaper of San Francisco, California, USA, Sunday, March 2, 1952. Pg. 112-113. Online at Newspapers.com [pay service]: https://www.newspapers.com/image/458826379/?terms=%22Eric%2BShipton%22%2Byeti
- Handwritten note by Tom Bourdillon, on the back of one of the "Yeti" print photos and listed in the Christie's auction website in 2014. Online [auction listing]: https://onlineonly.christies.com/s/out-of-the-ordinary/yeti-footprints-in-the-menlung-basin-1036/8405/ - [just the picture of note]: https://pccdn.perfectchannel.com/christies/live/images/item/OutoftheOrdinary/5820414/original/CSK_10745_1036_001.jpg
- Strange Stories, Amazing Facts, 1976 Reader's Digest Association, Inc., Pleasantville, New York, USA [third printing, May 1978]. ISBN: 0-89577-028-8. Pg. 436.