Brownlee, Raymond B. (Raymond Bedell), 1877-1954, Fuller, Robert W. (Robert Warren), 1871-1953, Hancock, William J., Whitsit, Jesse E. (Jesse Elon), 1874-, J.S. Cushing & Co. · Allyn and Bacon · leaf 18
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Science History Institute · Courtesy of Science History Institute · Public Domain Mark 1.0 (public domain). Free to use for anything.
