| 000 | 00451nam a2200145Ia 4500 | ||
|---|---|---|---|
| 008 | 170101s1972 xx 000 0 und d | ||
| 082 | _a631.8 K55M | ||
| 100 | _aKhan, Riaz Ahmad | ||
| 245 | 0 | _aMarginal rates of substitution of fertilizer for land derived from ................function | |
| 260 |
_aIslamabad, Pakistan _bUSAID. _c1972 |
||
| 300 | _a23cm. 114 | ||
| 650 | _aFERTILIZERS & MANURES | ||
| 653 | _aFERTILIZERS & MANURES | ||
| 942 |
_2ddc _cB |
||
| 999 |
_c54097 _d54097 |
||