TY  - BOOK
AU  - Butt, Dr. D.N.
AU  - Abid Hasan Usmani
AU  - Ulfat Afzal
TI  - An appraisal of mathematics text books: for classes I, II, III
U1  - 510 
PY  - 1988///
CY  - Lahore
PB  - Punjab Textbook Board
KW  - Mathematics
ER  -