TY  - BOOK
ED  - Saksharta niketan prakashan
TI  - प्रौढ़ ज्ञान विज्ञान | Praudh gyan vigyan
U1  - 500 
PY  - 1988///
CY  - Lucknow
PB  - Saksharta niketan prakashan
KW  - Natural sciences
ER  -