Western Resources Conference University of Colorado, Flack, J. E., & Shipley, M. C. (1968). Man and the quality of his environment. University of Colorado Press.
Citace podle Chicago (17th ed.)Western Resources Conference University of Colorado, J. Ernest Flack, a Margaret Cobb Shipley. Man and the Quality of His Environment. Boulder: University of Colorado Press, 1968.
Citace podle MLA (8th ed.)Western Resources Conference University of Colorado, et al. Man and the Quality of His Environment. University of Colorado Press, 1968.
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