Davis, P. G. (1960). Plumbing, heating, and piping estimators' guide. New York: McGraw-Hill Book Company.
Παραπομπή Chicago StyleDavis, Paul G. Plumbing, Heating, and Piping Estimators' Guide. New York: McGraw-Hill Book Company, 1960.
Παραπομπή MLADavis, Paul G. Plumbing, Heating, and Piping Estimators' Guide. New York: McGraw-Hill Book Company, 1960.
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