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1
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2Published 1976“...Alan Guttmacher Institute,...”
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3Published 2001“...Alan Guttmacher Institute,...”
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4Published 1998“...The Alan Guttmacher Institute,...”
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5Published 1999“...Alan Guttmacher Institute,...”
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6Published 2000“...Alan Guttmacher Institute,...”
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7Published 1999“...Alan Guttmacher Institute,...”
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8
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9Published 1978“...Alan Guttmacher Institute,...”
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10Published 1979“...Alan Guttmacher Institute,...”
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11Published 2002“...Alan Guttmacher Institute,...”
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12Published 2009“...Alan Guttmacher Institute,...”
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13Published 2002“...Alan Guttmacher Institute,...”
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14