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Contraceptive efficacy among married women, aged 15-44 years, United States.

National Center for Health Statistics (U.S.)
Hyattsville, Md. : U.S. Dept of Health and Human Services, Public Health Service, Office of Health Research, Statistics, and Technology, National Center for Health Statistics ; Washington : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1980. 1980

Contraceptive utilization, United States

Mosher, William D.
Hyattsville, Md. : U.S. Dept. of Health and Human Services, Public Health Service, Office of Health Research, Statistics, and Technology, National Center for Health Statistics ; Washington : For sale by the Supt. of Docs., U.S. Govt. Print, Off., 1981. 1981