LITERATURE CITED 
Galinat, W.C. 1969. The evolution under domestication of the maize 
ear: string cob maize. Univ. Mass. Expt. Sta. Bull. 577. 
——, 1972. Common ancestry of the primitive races of maize indi- 
genous to the Ayacucho area in Peru. Maize Gen. Coop. News 
letter 46: 108-109. 
Grobman, A.; W. Salhuana, and R. Sevilla, in collaboration with 
P.C. Mangelsdorf. 1961. Races of maize in Peru. Nat. Acad. Sci.- 
Nat. Res. Council, Publ. 915. 
Mangelsdorf, P.C. 1974. Corn, its origin, evolution, and improve- 
ment. Harvard Univ. Press, Cambridge. 
Pollard, G.C. 1971. Cultural change and adaptation in the central 
Atacama Desert of northern Chile. Nawpa Pacha 9: 41-64. 
Timothy, D.H.: B. Pefa V., and R. Ramirez E., in collaboration 
with W.L. Brown and E. Anderson. 1961. Races of maize in Chile. 
Nat. Acad. Sci.-Nat. Res. Council, Publ. 847. 
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