Cowling, T. G. Molecules in motion / T.G. Cowling. - London ; New York ; New York : Harper & Brothers, 1960 - 183 p. : diagrs. ; 19 cm. - Harper torchbooks / The cloister library. . Includes index. Subjects--Topical Terms: Gases.Molecules. Dewey Class. No.: 533 / COM 1960