[Russian physicians--geographer-discoverers (from the 18th to early 20th centuries)].
D005843:Geography; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D010820:Physicians; D012425:Russia (Pre-1917)
Otechestvennye vrachi--geografy-pervootkryvateli (18 nachalo 20 veka)