@book {2047,
	title = {Principles of Angiosperm Taxonomy},
	year = {1963},
	pages = {556},
	publisher = {Oliver \& Boyd},
	organization = {Oliver \& Boyd},
	address = {Edinburgh \& London},
	keywords = {TAXONOMY},
	author = {Davis, P. H. and Heywood, V. H.}
}
