Worthen, B.R. Sanders, J.R. Educational evaluation:theory and practice - CharlesA. Jones Publishing Company Ohio 1973 - xi,372p.,tables - Evalutaion studies planning - International Series in Ecucation . ISBN: 0839600313 Nat. Bib. No.: 2613 Nat. Bib. Agency Control No.: 37.01WOR Subjects--Topical Terms: Education Universal Decimal Class. No.: 37.01 1