Text ( visual ) : unmediated Elements of mathematics program. -- St. Louis, Mo. : CEMREL , c1976. -- iii, 65 p. : ill. ; 29 cm. -- At head of title: Comprehensive School Mathematics Program. -- (BB00148181) ; https://ci.nii.ac.jp/ncid/BB00148181 Author Heading(s): Comprehensive School Mathematics Program ; Central Midwestern Regional Educational Laboratory

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