Mortimer, Charles E. Chemistry : a conceptual approach / Charles E. Mortimer. - 4th ed. - New York : D. Van Nostrand Co., c1979. - xiv, 812 pages : illustrations ; 25 cm. Includes index. Subjects--Topical Terms: Chemistry. LC Class. No.: QD 261 / .M61 1971 Dewey Class. No.: 540