Washington Operations Research Council & Chartrand, R. L. (1971). Hope for the cities: A systems approach to human needs. Spartan Books.
Citace podle Chicago (17th ed.)Washington Operations Research Council a Robert L. Chartrand. Hope for the Cities: A Systems Approach to Human Needs. New York: Spartan Books, 1971.
Citace podle MLA (8th ed.)Washington Operations Research Council a Robert L. Chartrand. Hope for the Cities: A Systems Approach to Human Needs. Spartan Books, 1971.
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