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Dyfyniad Arddull ChicagoDumas, Lloyd J. Conservation Response: Strategies for the Design and Operations of Energy Using Systems. Toronto: D C Heaths, 1976.
Dyfyniad MLADumas, Lloyd J. Conservation Response: Strategies for the Design and Operations of Energy Using Systems. D C Heaths, 1976.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.