Cover image for Intellectual development of children by demographic and socioeconomic factors, United States.
Title:
Intellectual development of children by demographic and socioeconomic factors, United States.
Author:
Roberts, Jean, 1918-
Personal Author:
Publication Information:
Rockville, Md. : National Center for Health Statistics; [for sale by the Supt. of Docs., U.S. Govt. Print. Off., Washington], 1971.
Physical Description:
i, 71 pages : illustrations ; 27 cm.
Language:
English
Format :
Book