00804cam a2200241 4500 714486610 TxAuBib 20230321120000.0 840326s1972||||||||||||||||||||||||eng|u 9780395133644 0395133645 TxAuBib Modern school mathematics : structure and use / Ernest R. Duncan ... [et al.]. Boston : Houghton Mifflin Co., 1972. 3 v. : ill. ; 24-28 cm. Nongraded, Book 8. Includes index. [v. 1.] Text -- [v. 2.] Teacher's ed. -- [v. 3.] Workbook. 20230321. Mathematics Study and teaching (Elementary.) Duncan, Ernest R., (Ernest Rowland.) MRLJG