TY  - BOOK
AU  - Gupta,Shikha
AU  - Nautiyal,Shikha
TI  - National science olympiad: exploring the world of science 
SN  - 9789357940429 (pbk.)
U1  - 507 22
PY  - 0000///n.d
CY  - New Delhi
PB  - V & S publishers
KW  - Science
KW  - Study and teaching
KW  - Problems, exercises, etc
ER  -