prepared by Brian J.L. Berry for the Social Science Research Council, Committee on Areas for Social and Economic Statistics, in cooperation with the Bureau of the Census, U.S. Dept. of Commerce ; cartographer: Gerald Pyle
Shows regions where more than five percent of workers resident in one central county commute to another central county, regions where more than five percent of workers resident in any county of one functional economic area commute to the central county of another, national parks and forests, Indian reservations, and areas having less than 2 persons per square mile.