@book{156036,
	author = {Szperkowicz, Jerzy. and Towarzystwo Naukowe w Toruniu.},
	title = {Nicolás Copérnico, 1473-1973},
	publisher = {PWN},
	year = {1972.},
	address = {Varsovia},
	note = {At head of title: Sociedad Científica de Torún.}
}