@book{51184,
	author = {Walstra, Pieter.},
	title = {Growth and carcass composition from birth to maturity in relation to feeding level and sex in Dutch landrace pigs},
	publisher = {Veenman and Zonen,},
	year = {1980},
	series = {Mededelingen Landbouwhogeschool},
	address = {Wagening, H. :}
}