TY - BOOK ED - United States. Department of Health, Education, and Welfare. Public Health Service TI - Optometric Manpower: Characteristics of Optometric Practice,United States -1968 T2 - Vital and Health Statistics.Series 14: Data on National Health Resources, no.13 PY - 1974/// CY - Rockville,Md. PB - National Center for Health Statistics ER -