@book {4932,
	title = {Scientific survey of Porto Rico and the Virgin Islands 5: Botany of Porto Rico and the Virgin Islands},
	year = {1924},
	note = {010, 027, 133, 167},
	publisher = {Published by the academy},
	organization = {Published by the academy},
	chapter = {309-314},
	address = {New York},
	author = {Britton, N. L. and Wilson, P.}
}
@book {4933,
	title = {Scientific survey of Porto Rico and the Virgin Islands 6 (suppl.)},
	year = {1930},
	note = {010, 198},
	publisher = {Published by the academy},
	organization = {Published by the academy},
	chapter = {536},
	address = {New York},
	author = {Britton, N. L. and Wilson, P.}
}
