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elmer ambrose sperry (1860-1930)

Biographical memoir of Elmer Ambrose Sperry, 1860-1930

By Jerome C. Hunsaker

Warera no shireru Superī Hakushi

By

Science and the instrument-maker

By Thomas Parke Hughes

John Hays Hammond papers

By Hammond, John Hays

Elmer Sperry; inventor and engineer

By Thomas Parke Hughes

Elmer Ambrose Sperry, 1860-1930

By Jerome Clarke Hunsaker

Dr. Sperry as we knew him

By Russel L. Durgin

Elmer Sperry

By Tomas Parke Hughes