The Modern Computing Abacus/Abaco Moderno Computador No 7748

The Modern Computing Abacus/Abaco Moderno Computador No 7748 by Elda L Merton. Published by Ideal School Supply Co, Oak Lawn, IL, 1964. 1st Edition. Paperback. Size 4to (up to 12'' tall). Condition: Nr Fine. Stain to top corner1st two pages Spanish side, content not affected. 33 Pgs. 2 books in one, English version on one side, flip the book upside down and over for the Spanish side. A complete how-to guide to the Abacus. Illustrated. Description text copyright 2007 BooksForComfort. Item ID 15197.