Aggregate and lifetime contraceptive failure in the United States.
作者信息
Trussell J, Vaughan B
机构信息
Office of Population Research, Princeton University.
出版信息
Fam Plann Perspect. 1989 Sep-Oct;21(5):224-6.
PMID:2806489
Abstract
摘要
Trussell J, Vaughan B
Office of Population Research, Princeton University.
Fam Plann Perspect. 1989 Sep-Oct;21(5):224-6.
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