TY  - BOOK
AU  -  Sobel ,Max A.; Maletsky ,Evan M.
TI  - Teaching Mathematics:a source book of aids, activites, and stategies
SN  - 0-13-894148-3
PY  - 1991///
CY  - Boston 
KW  - Mathematics
KW  - Humanities and Natural sciences
ER  -