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The Opt-In Revolution? Contraception and the Gender Gap in ..
NBER working paper series, no. w17922
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3
Twenty-seventh annual report of the National Advisory Commi..
United States congressional serial set ; serial set no. 10678;Senate document / 77th Congress, 2nd session. Senate ; no. 170
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Annual report of the Board of Regents of the Smithsonian In..
United States congressional serial set ; serial set no. 1785;Mis. doc. / 45th Congress, 2nd session. Senate ; no. 35