@book{13693,
	author = {Beek, C. P., Van der.},
	title = {On the origin of the polyhedral protein of the nuclear polyhedrosis virus of Autographa california},
	publisher = {Veenman { Zonen,},
	year = {1980},
	series = {Mededelingen Landbouwhogeschool},
	address = {Wageningen :}
}