StLB ) Brownell, William Arthur, 1895-1977: Learning the mulitplication combinations. - Durham : Duke University Press, 1943. - XII, 177 S. ( Kollat: XII, 177 S.)(Duke University research studies in education ; 7)
Sign.: 131675 II *
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| ( StLB ) Brownell, William Arthur, 1895-1977: Learning the mulitplication combinations. - Durham : Duke University Press, 1943. - XII, 177 S. ( Kollat: XII, 177 S.) (Duke University research studies in education ; 7) Sign.: 131675 II * |