00671nam a2200277 4500 000 000 20150420091913.0 000 000 78177441 0393093859 UOEL DLC DLC QD33 .P6 540 Porterfield, William W. Concepts of chemistry [by] William W. Porterfield. [1st ed.] New York, Norton [1972] xii, 948 p. illus. 24 cm. $12.95 Includes bibliographies. Chemistry. 7 cbc orignew 2 ncip 19 y-gencatlg lcc LL 5595 5595