@book{45538,
	author = {Krypton, Constantine,},
	title = {The northern sea route and the economy of the Soviet north  /},
	publisher = {Methuen & Co. ,},
	year = {1956.},
	series = {Research programme on the U.S.S.R.: Studies ;},
	address = {London :},
	note = {Praeger publications in Russian history and world communism, no.42.}
}