Ferns and allied plants : with special reference to Tropical America - Tryon, Rolla Milton 1916-2001; Tryon, Alice Faber 1920-2009; Hodge, Walter Henricks 1912-2013 (New York : Springer-Verlag, 1982)
Keywords: HELECHOS -- CLASIFICACION -- AMERICA; HELECHOS -- IDENTIFICACION -- AMERICA