DICTISAURUS ANGLE'S D
EDUCATIONAL SELF-LEARNING NOTEBOOKS-NAMELY, NOTEBOOKS HAVING A TOPICAL INDEX AND REMOVABLE BLANK PAGES ON WHICH THE USER ADDS WORDS OF INTEREST TOGETHER WITH A BRIEF MEANING OR EXPLANATION THEREOF AND THEREAFTER FILES THE PAGES BY TOPIC ACCORDING TO THE USER'S MENTAL ASSOCIATION OF THE WORD AND TOPIC
Expired · November 14, 1974 · 73037161 ·