APA

Kovar M. G., National Center for Health Statistics (U.S.) & National Natality Survey (U.S.). (1972). Differentials in expectation of additional children among mothers of legitimate live births: United States, 1964-1966. Rockville, Md: U.S. Department of Health, Education, and Welfare, Public Health Service, Health Services and Mental Health Administration, National Center for Health Statistics.

Chicago

Kovar Mary Grace, National Center for Health Statistics (U.S.) and National Natality Survey (U.S.). 1972. Differentials in expectation of additional children among mothers of legitimate live births: United States, 1964-1966. Rockville, Md: U.S. Department of Health, Education, and Welfare, Public Health Service, Health Services and Mental Health Administration, National Center for Health Statistics.

Harvard

Kovar M. G., National Center for Health Statistics (U.S.) and National Natality Survey (U.S.). (1972). Differentials in expectation of additional children among mothers of legitimate live births: United States, 1964-1966. Rockville, Md: U.S. Department of Health, Education, and Welfare, Public Health Service, Health Services and Mental Health Administration, National Center for Health Statistics.

MLA

Kovar Mary Grace, National Center for Health Statistics (U.S.) and National Natality Survey (U.S.). Differentials in expectation of additional children among mothers of legitimate live births: United States, 1964-1966. Rockville, Md: U.S. Department of Health, Education, and Welfare, Public Health Service, Health Services and Mental Health Administration, National Center for Health Statistics. 1972.