@book{54065,
	author = {Seminar of the Labour and Labor Management in Horticulture ( and Krijgsman, H. K.},
	title = {Proceedings},
	publisher = {International Society for Horticultural Science,},
	year = {1973},
	series = {Acta Horticulturae},
	address = {The Hague :},
	note = {c.1 en p.p.}
}