Population maps of the Western Hemisphere :
A list of national and regional population maps from 1960 in the Geography and Map Division, Library of Congress /
[by] John R. Hébert.

APA Citation

Library of Congress. Geography and Map Division., Hébert, J. R. (1971). Population maps of the Western Hemisphere: A list of national and regional population maps from 1960 in the Geography and Map Division, Library of Congress. Rev. [Washington, D. C.]: The Library.

MLA Citation

Library of Congress. Geography and Map Division, and John R Hébert. Population Maps of the Western Hemisphere: A List of National And Regional Population Maps From 1960 In the Geography And Map Division, Library of Congress. Rev. [Washington, D. C.]: The Library, 1971.