Loewenberg, B. J. (1969). Darwinism comes to America, 1859-1900. Philadelphia, Pennsylvania.
Lua i Stíl Chicago (17ú heag.)Loewenberg, Bert James. Darwinism Comes to America, 1859-1900. Philadelphia, Pennsylvania, 1969.
Lua MLA (8ú heag.)Loewenberg, Bert James. Darwinism Comes to America, 1859-1900. Philadelphia, Pennsylvania, 1969.
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