B. F. Porshnev

Boris Fedorovich Porshnev (Russian Cyrillic: Борис Фёдорович Поршнев; February 22 (March 7), 1905 - November 26, 1972) was a Soviet Russian historian and sociologist who led expeditions during the 1960s in Central Asia, the Pamir Mountains, and Himalayas in search of evidence for the Almas.