Supply one or more terms to search for in the citation titles and submit the search. Search results will be determined by the Boolean logic used. Left to right rules apply.

For example, the following three search strategies may produce different results.

• # 1: fertility or marriage and childbearing may produce 91 matches;
  
• # 2: fertility and marriage and childbearing may produce 2 matches;
  
• # 3: fertility and marriage or childbearing may produce 100 matches.

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