Letherman, K. M. Automatic controls for heating and air conditioning principles and applications K.M. Letherman - 1st ed - Oxford New York Pergamon 1981 - xiv, 235 p. ill. 24 cm - International series in heating, ventilation, and refrigeration v. 15 . Includes index Subjects--Topical Terms: Heating--ControlAir conditioning--Control Dewey Class. No.: 697