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Start Over Subjects Cooperative Behavior ✖Remove constraint Subjects: Cooperative Behavior Subjects Military Personnel ✖Remove constraint Subjects: Military Personnel Subjects World War I ✖Remove constraint Subjects: World War I Titles Are you in this? ✖Remove constraint Titles: Are you in this? Dates by Range 1900-1949 ✖Remove constraint Dates by Range: 1900-1949 Publication Year 1916 ✖Remove constraint Publication Year: 1916

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