U.S. Dept. of Health and Human Services, Public Health Service, Health Care Financing Administration19802nd ed., Sept. 1980DHHS publication
no. (PHS) 80-1260
Dept. of Health, Education, and Welfare, Office of Human Development Services, Administration for Children, Youth and Families, Head Start Bureau] : For sale by the Supt. of Docs., U.S. Gov't. Print. Off.1978DHHS publication
no. (OHDS) 80-31117