@book{305106,
	author = {Zonn, Sergej Vladimirovič},
	title = {Vasilij Vasil΄evič Dokučaev, 1846-1903},
	publisher = {Nauka},
	year = {1991},
	series = {Naučno-biografičeskaâ seriâ},
	address = {Moskva}
}