00497nam a2200157 a 450000500170000000800410001710000220005824500760008026000360015630000340019244000120022665000490023870000210028770000200030885200110032820190520021811.0090324s19uu    xx            00    eng d10aRucker, Walter E.10aHeath mathematics /cWalter E. Rucker, Clyde A. Dilley, David W. Lowry.0 aLexington, MA :bHeath,cc1987.  a1 v. (various pagings) : col. 0aLevel 4  aMathematicsxStudy and teaching (Elementary)1 aDilley, Clyde E.1 aLowry, David W.  7OLOPSC