См. Willett F. The Introduction of Maize in to West Africa // Africa. — Durban, 1962.-Vol. 32.-P. 1-13.
131
См. Whitaker T. W. Endemism and pre-Columbian Migration of the Bottle Gourd Lagenaria siceraria // Riley C. L. et al (eds.) Man Across the Sea. — Austin, 1971.—P. 320–327.
