Callicott, J. B. (1987). Companion to A sand county almanac : interpretive & critical essays: Interpretive and critical essays. University of Wisconsin Press.
Citace podle Chicago (17th ed.)Callicott, J. Baird. Companion to A Sand County Almanac : Interpretive & Critical Essays: Interpretive and Critical Essays. Madison, WI: University of Wisconsin Press, 1987.
Citace podle MLA (9th ed.)Callicott, J. Baird. Companion to A Sand County Almanac : Interpretive & Critical Essays: Interpretive and Critical Essays. University of Wisconsin Press, 1987.
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