TY  - BOOK
AU  - Gosain, Roopa
TI  - 101 inventions and discoveries
SN  - 8172461806[paperback]
CY  - Goodwill publishing house
PB  - B-3, Rattan Jyoti, 18, Rajendra place
N1  - Contents: airplane,  almanac, anesthesia
ER  -