Curtis, F. D., & Urban, J. (1958). Teachers' manual and key for Curtis and Urban's Biology: The living world. Ginn and Company.
Citace podle Chicago (17th ed.)Curtis, Francis D., a John Urban. Teachers' Manual and Key for Curtis and Urban's Biology: The Living World. Boston: Ginn and Company, 1958.
Citace podle MLA (8th ed.)Curtis, Francis D., a John Urban. Teachers' Manual and Key for Curtis and Urban's Biology: The Living World. Ginn and Company, 1958.
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