(Q34708203)
Statements
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Prolonged intrauterine contraception: a seven-year randomized study of the levonorgestrel 20 mcg/day (LNg 20) and the Copper T380 Ag IUDS. (English)
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Sivin I
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Stern J
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Coutinho E
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Mattos CE
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el Mahgoub S
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Diaz S
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Pavez M
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Alvarez F
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Brache V
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Thevenin F
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1 November 1991
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44
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473-480
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Identifiers
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