[Fedor Petrovich Gaaz and his research in studying the therapeutic mineral springs of the Caucasus].
D049671:History, 18th Century; D049672:History, 19th Century; D008900:Mineral Waters / Q000266:history*; D012425:Russia (Pre-1917)
D008900:Mineral Waters
Fedor Petrovich Gaaz i ego issledovaniia po izucheniiu lechebnykh mineral'nykh istochnikov Kavkaza.