Fred Gissoni, “Using the Cranmer ABACUS for the Blind”, 1964.
Here I present: Fred Gissoni, Using the Cranmer ABACUS for the Blind, American Printing House for the Blind, Louisville KENTUCKY, 1962. INTRODUCTION. Fred Gissoni, Using the Cranmer ABACUS for the Blind, 1964 is abacus arithmetic book for the blind. Four (4) arithmetic functions: add, subtract, multiply & divide are presented for blind students. The Cranmer ABACUS was designed … Continue reading Fred Gissoni, “Using the Cranmer ABACUS for the Blind”, 1964.
