iii, 36 pages : including tables, diagrams ; 23 cm
OCLC
ocm07648550, ocn574398651
At head of title: United States Dept. of Labor ... Bureau of Labor Statistics ... in cooperation with Federal Security Agency, United States Office of Education.
"By Walter J. Greenleaf, of the Office of Education, and by Cora E. Taylor and Harold Goldstein, of the Bureau of Labor Statistics."--Letter of transmittal.