@book{31586,
	author = {Cremer, Margaretha C.},
	title = {Developmental stages of flower formation in tulips, narcissi, irrises, hyacinths and lilies},
	publisher = {Veenman & Zonen,},
	year = {1974},
	series = {Mededelingen Landbouwhogeschool},
	address = {Wageningen :}
}