Washington : Department of Agriculture, 1961

Washington : Department of Agriculture, 1938

Washington : Department of Agriculture, 1948

Washington : Department of Agriculture, 1955

Washington : Department of Agriculture, 1957

Reino Unido : Royal Botanic Gardens, 2004 0-10-292928-9

By Brown, Lester R..
Madrid : Emecé, 1994 .
477 p. ; 22,5 cm.
8478881514

Buenos Aires : Comité Nacional de Geografía, 1943 .
340 p. : 26 cm.

Buenos Aires : Comité Nacional de Geografía, 1941 .
651 p. : 26 cm.

San Salvador de Jujuy : Min.de Hacienda, 1965 .
124 p. : 26 cm.