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Subjects
Equipment and Supplies
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Authors
Brackett, Frederick S. (Frederick Sumner), 1896-1988, author
✖Remove constraint Authors: Brackett, Frederick S. (Frederick Sumner), 1896-1988, author
Authors
Hatch, Theodore F., author
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Titles
Fourth 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 aiming circle and development of an improved instrument
✖Remove constraint Titles: Fourth 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 aiming circle and development of an improved instrument