TY  - BOOK
ED  - US Health Education and Welfare. Dept.of Public Health Service
TI  - Quality Control in a National Health Examination Survey
T2  - Vital and Health Statistics.Series 2: Data Evalution and Methods Research, no. 44
PY  - 1972///
CY  - Rockville Md.
PB  - National Centre forHealth Statistics
KW  - Health occupation
KW  - US
ER  -