Pai, Hang Young books & textbook
The complete book of Chisanbop: Original finger calculation method created by Sung Jin Pai and Hang Young Pai
Van Nostrand Reinhold Co /1981T Hardcover / 330 Pages
isbn-10: 0442275692 / isbn-13: 9780442275693
PArent's Guide To Chisanbop: The Original Finger Calculation Method [Addition Stage 1, Multiplication Stage 1 Algebra Missing Addends Stage 1]
Chisanbop Enterprises /1978T Paperback
