[P.N. Diatroptov and his role in enviromental sanitation (on the 100th anniversary of the Kherson estates)].
D000818:Animals; D002415:Cats; D049673:History, 20th Century; D012425:Russia (Pre-1917); D012499:Sanitation / Q000266:history
P.N. Diatroptov i ego rol' v ozdorovlenii vneshneĭ sredy (k 100-letiiu Khersonskogo zemstva)