TY  - BOOK
ED  - United States.
TI  - DHEW health research principles
U1  - 614.4273 
PY  - 1978///
CY  - Washington, D.C.
PB  - Department of Health, Education and Welfare
KW  - Medical statistics
KW  - United States
KW  - Health surveys
N1  - Library has vol.1
ER  -