Khurmi, R.S. Khurmi, R.S. & Gupta, J. K. A Text Book of Refrigeration and Air conditioning - 1st. Ed. - New Delhi S. Chand & Company Ltd. 2009 - xii, 682 p. 20 cm. Text in English ISBN: 8121927811 Dewey Class. No.: 621.56 / KHU