@book{33117,
	author = {Nowicke, Joan W.},
	title = {Pollen morphology and the relationship of the Plumbaginaceae, Polygonoceae, and Primulaceae to the order Centrospermae},
	publisher = {Smithsonian Institution,},
	year = {1977},
	series = {Smithsonian contributions to botany},
	address = {Washington :}
}