Malate, Mark Francis L., Development and validation of abacus-based worksheet for mathematics 7 / Mark Francis L. Malate. - Iriga City: University of Saint Anthony, 2025. - xii, 96 leaves : figure, tables ; 27 cm. Includes bibliographical references and appendices. Subjects--Topical Terms: Mathematics Instruction. Dewey Class. No.: 372.7 / M239d