[Fedor Petrovich Gaaz (on the 200th anniversary of his birth)].
D005858:Germany; D049671:History, 18th Century; D049672:History, 19th Century; D007388:Internal Medicine / Q000266:history; D012425:Russia (Pre-1917)
Fedor Petrovich Gaaz (k 200-letiiu so dnia rozhdeniia).