TY - BOOK AU - Krulik,Stephen TI - A handbook of aids for teaching junior-senior high school mathematics SN - 0721655408 AV - QA11QA11 .K78.K78 U1 - 510/.71/2 PY - 1971/// CY - Philadelphia PB - Saunders KW - Mathematics KW - Study and teaching (Secondary) KW - Teaching KW - Aids and devices ER -