The orchids of Panama : annotated check-list genera and species ; The swan orchids : a revision of the genus cycnoches - Allen, Paul Hamilton 1911-1963 ([Lugar de publicación no identificado] : [editor no identificado], 1953)
Reprinted from The Orchid journal Volume II, 1953, Vol. I, 1952
Keywords: ORQUIDEAS -- PANAMA; BOTANICA -- PANAMA