@book {15661,
	title = {Die Robben der Europ{\"a}ischen Gew{\"a}sser},
	series = {Monographien der Wilds{\"a}ugetiere.},
	volume = {12},
	year = {1952},
	pages = {221-229.},
	publisher = {P. Sch{\"o}ps.},
	organization = {P. Sch{\"o}ps.},
	address = {Frankfurt.},
	keywords = {Mammalia},
	author = {Mohr, E.}
}
