[The work of Avgust Andreevich Letavet (birth centenary)].
Vorontsova
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EI
Korbakova
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D049672:History, 19th Century; D049673:History, 20th Century; D006920:Hygiene / Q000266:history; D012426:Russia
Tvorcheskiĭ put Avgusta Andreevicha Letaveta (k 100-letiiu so dnia rozhdeniia).