Willcox, J. (1892). On the evolution of the earth and the heavenly bodies. S.l..
Lua i Stíl Chicago (17ú heag.)Willcox, Joseph. On the Evolution of the Earth and the Heavenly Bodies. S.l., 1892.
Lua MLA (8ú heag.)Willcox, Joseph. On the Evolution of the Earth and the Heavenly Bodies. S.l., 1892.
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