@book{91453,
	author = {Wal, P. van der.},
	title = {Het effect van 10 DPM penicilline-streptomycine op de mestresultaten bij varkens van 20 - 90 kg.},
	publisher = {Landbouwhogeschool,},
	year = {1966.},
	address = {Wageningen,}
}