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_aSingh, Inderjit. _9106612 |
| 245 | _aFactor utilization and substitution in economic development ; a case study green revolution | ||
| 260 |
_a(s.l.) : _bSocial Systems Research Institute, _c1973 |
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| 300 |
_a34 h. _b; gráfs. |
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| 490 |
_aWorkshop series _v; 7301 |
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_aAgricultura _xInnovaciones tecnológicas. _91565 |
| 650 | 1 | 4 | _aDesarrollo económico. |
| 700 | 0 |
_aDay, Richard H. _931343 |
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_aWorkshop series _v; 7301 _9122681 |
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