Weidner, Richard T. Sells, Robert L. Elementary physics , classical and modern Richard T. Weidner , Robert L. Sells ; with the assistance of Arthur E. Walters - Allyn and Bacon Boston 1975 1975 - xvi, 813 p. : ill., tables ; 24 cm. Includes index Subjects--Topical Terms: Physics--QC LC Class. No.: QC23.W414