TY  - BOOK
AU  - NCERT
TI  - Mathematics: : textbook for class vii
SN  - 81-7450-669-1
U1  - 510 N213M 
PY  - 2007///
CY  - New Delhi
PB  - : NCERT
KW  - Mathematics-Textbook-Class7
UR  - https://ncert.nic.in/textbook.php?gemh1=ps-13
ER  -