@book{58258,
	author = {Prins, W. H. and Postmus, J.},
	title = {The seasonal response of grassland to nitrogen at diferent levels of nitrogen pretreatment II},
	publisher = {Landbouwkunding Bureau Van de Nederlandse Meststoffesnindutrie,},
	year = {1981},
	series = {Netherlands Nitrogen Technical Bulletin},
	address = {Gravenhage, Netherlands :}
}