found: Coldrey, J. Penguins, 1983:t.p. (Douglas Allan)
found: His The world of penguins, 1988:CIP t.p. (Doug Allan)
found: Life on Earth, ©2010:on-screen caption (Doug Allan, wildlife cameraman)
found: Doug Allan web page, viewed June 15, 2016(Doug Allan, freelance wildlife and documentary cameraman; born 1951, Scotland; degree in marine biology from Stirling University, 1973; research diver, British Antarctic Survey, 1976-1985, diver at Signy Island in the South Orkneys, Base Commander at Halley Station; contributor to several BBC series; lives in Bristol; has company called Tartan Dragon Ltd) - http://dougallan.com/#about
found: IMDB website, viewed June 15, 2016(Doug Allen, cinematographer, b. 1951 in Dunfermline, Fife, Scotland; alternate name: Doug Allan)
found: Email from author, June 20, 2016(Doug Allan the wildlife photographer and cinematographer is the same person as Douglas Allan the photographer for The World of Penguins book)