TOVERA , D. Principles of teaching and instructional technology - Quezon City: Katha Pub. Co., Inc., c1988. - v, 133 pages. 25 cm. Includes index. ISBN: 971-150-073-6. Subjects--Topical Terms: 1. Educational Technology.2. Instructional Systems - Designs. Dewey Class. No.: Fil. 371.1 P935 1988