United States or Guinea ? Vote for the TOP Country of the Week !
Journal of Washington Academy of Sciences, VI, No. 4, 86-90, 1916. Agriculture and Native Vegetation in Peru. Ibid., VI, No. 10, 284-293, 1916. Illus. Staircase Farms of the Ancients. National Geographic Magazine, XXIX, 474-534, May, 1916. Illus. Foot-Plow Agriculture in Peru. Smithsonian Report for 1918, 487-491. 4 pl. Domestication of Animals in Peru.
Word Of The Day