Adams, A., & Newhall, N. W. (1960). This is the American earth. Sierra Club.
Cita Chicago Style (17a ed.)Adams, Ansel, y Nancy Wynne Newhall. This Is the American Earth. San Francisco: Sierra Club, 1960.
Cita MLA (9a ed.)Adams, Ansel, y Nancy Wynne Newhall. This Is the American Earth. Sierra Club, 1960.
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