Personal Details Born 1867 Died 1955 Main nationality USA Documentation Photo span 1922-1925 Publication Geology of Mongolia : a reconnaissance report based on the investigations of the years 1922-1923, 1927 https://archive.org/details/geologyofmongoli00berk The Permian of Mongolia : a report on the Permian fauna of the Jisu Honguer limestone of Mongolia and its relations to the Permian of other parts of the world, 1931 https://archive.org/details/permianofmongoli00grab National Academy of Sciences, “Charles Peter Berkey 1867-1955, A Biographical Memoir” by Paul F Kerr http://www.nasonline.org/publications/biographical-memoirs/memoir-pdfs/berkey-charles-p.pdf <photographs stored at the natural history museum > http://lbry-web-007.amnh.org/digital/search?query=Central+Asiatic+Expeditions+%281921-1930%29&query_type=keyword&submit_search=Search Notes a member of Central Asiatic Expeditions of the American Museum of Natural History, under the leadership of Roy Chapman Andrews