1940 United States Federal Census - Alvin Kahn
The cited information was sourced from Census
Source Notes
The U.S. census taken on April 1, 1940 was the 16th census of the United States. It tallied the population of the country at 131,669,000 for the continental U.S. (this excludes both Hawaii and Alaska) and 150,621,231 for the U.S. and all territories and possessions except the Philippines. This represented an increase of 7.2 percent in the continental U.S. since the 1930 census.