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Start Over You searched for: Formats Text Remove constraint Formats: Text Copyright Public domain Remove constraint Copyright: Public domain Dates by Range 1900-1949 Remove constraint Dates by Range: 1900-1949 Publication Year 1945 Remove constraint Publication Year: 1945

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431. Second partial report on Project no. 37 -- study of errors in field artillery practice: subject: an analysis of the sources of error in the use of the panoramic telescope M12 and development of principles of design for an improved instrument