@book{83089,
	title = {Megasporogenesis; a comparative study of the ultrastructural aspects of megasporogenesis in Lilium, Allium and Impatiens},
	publisher = {H.Veenman and Zonen B.V.},
	year = {1978},
	series = {Medelingen Landbouwhogeschool, Wageningen, Nederland, 78-16},
	address = {Wageningen}
}