| Literature DB >> 922443 |
Abstract
Entities:
Keywords: Contraception; Contraceptive Effectiveness; Contraceptive Methods; Copper; Family Planning; Ingredients And Chemicals; Inorganic Chemicals; Iud; Iud Material; Metals; Use-effectiveness
Mesh:
Substances:
Year: 1977 PMID: 922443 PMCID: PMC1631814 DOI: 10.1136/bmj.2.6094.1087
Source DB: PubMed Journal: Br Med J ISSN: 0007-1447