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| 100 | 1 |
_9106546 _aPOTTINGER, A.J. |
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| 260 | _c1992 | ||
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_9147942 _aFIJACION DE NITROGENO |
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_9151984 _aINVESTIGACION |
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_9142229 _aCOOPERACION INTERNACIONAL |
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_9134624 _aAFRICA TROPICAL |
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_tNitrogen Fixing Tree Research Reports (EUA) _d1992 _gv.10 p.7-10 |
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| 245 | 1 | 0 | _aNitrogen fixing tree research networks coordinated by the Oxford Forestry Institute |
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