@book{19408,
	author = {Elliott, Hugh F. I, ed.},
	title = {IUCN  twelfth technical meeting, Banff, Alberta, Canada, 12 to 15 September 1972 ; edited by Hugh F. I. Elliott},
	publisher = {International Union for Conservation of Nature and Natural Resources},
	year = {1973},
	address = {Morges}
}