Proceedings of the eighth American Scientific Congress : held in Washington May 10-18, 1940.

Washington-DC : Department of State.

Razas y lenguas indigenas de Mexico, su distribucion geografica;

von Vivó, Jorge Abilio 1906-
Publicación (Pan American Institute of Geography and History) no. 52
Mexico, D.F. : ["Industrial grafica,, s. a."], 1941.
Umfang/Format: 58 p. : 2. 1. plates, maps (part fold.) ; 29 cm.