| 000 | 00352cam a22001217a 4500 | ||
|---|---|---|---|
| 008 | 180718b1989 xxu||||| |||| 00| 0 eng d | ||
| 082 | _aY Si64 | ||
| 100 | _aSingh, H.S. | ||
| 245 |
_aPrinciples of environmental conservation _cby H.S. Singh |
||
| 260 |
_aDehradun _bInternational Book Distributors _c1989 |
||
| 300 | _a273p. | ||
| 650 | _aNatural resources | ||
| 999 |
_c353188 _d353188 |
||