Encyclopaedia of scientific developments inventions and discoveries
Furkejuvvon:
| Eará dahkkit: | |
|---|---|
| Materiálatiipa: | Girji |
| Giella: | English |
| Almmustuhtton: |
New Delhi :
Bhavana Books and Prints ,
1996
|
| Fáttát: | |
| Fáddágilkorat: |
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Discoveries and invention of twentieth century