Outlines of the earth's history;
a popular study in physiography,
Shaler, N. Southgate. (1898). Outlines of the earth's history: a popular study in physiography. New York: D. Appleton and company.
Shaler, Nathaniel Southgate, 1841-1906. Outlines of the Earth's History: a Popular Study In Physiography. New York: D. Appleton and company, 1898.
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