From a letter (?) mailed (with the book) to Dr. Thomas Mathews, Director, Institute of Caribbean Studies on November 29, 1962 from the UNAM (likely a request for a review):
With racial tensions predicted to increase in Latin America a survey of race relations and current (1940 - 1960) studies on this area of human relations is timely and necessary. Mexican sociologist Juan Comas' study, sponsored by UNESCO, was originally published in the Revue Internationale des Social Sciences (Vol. XIII, Num. 2, 1961)...