Concepts of general chemistry/ C.R. McLellan, Marion C. Day, Jr. [and] Roy W. Clark. McLellan, Crawford R. Day, Marion Clyde, 1927- joint author. Clark, Roy W., joint author. Chemistry. QD31 .M24 541.2 MCC Philadelphia, F.A. Davis Co. [1966] [1966] 1966 Text viii, 577 p. eng