@book{47369,
	author = {Van den Noort, M. E. and Wassink, E. C.},
	title = {On diffente forms of flowers in the same spike in Digitalis purpurea L., F. Heptandra De Chamisso},
	publisher = {Veenman & Zonen,},
	year = {1980},
	series = {Mededelingen Landbouwhogeschool},
	address = {Wageningen :}
}