00284nam a22000977a 450000500170000000800410001702000150005804000080007324500510008126000540013220200828162048.0200828b           ||||| |||| 00| 0 eng d  a0024228613  cCML  aScience for the Elementary School.cVictor, E.  aNew YorkbMacmillan Publishing Company, Incc1989