Hammond, John Hays, 1855-1936
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Sources of Information
- History of the Panama Canal, 1915:t.p. (John Hays Hammond, associate ed.) p. 473 (b. San Francisco, Ph.B., A.M., Yale University, engineer, geological surveyor, president, Am. Inst. Mining Engineers)
- The milling of gold ores ... 1887?
- Cal. State Mining Bureau.The milling of gold ores ... 1887?