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|a AR-LpoUNG
|b spa
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|e aacr
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041 |
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|a eng
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082 |
0 |
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|a 338.1 545var
|
100 |
1 |
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|a Anderson, Jock R.
|e ed.
|
245 |
1 |
0 |
|a Variability in grain yields :
|b implications for agricultural research and policy in developing countries
|
260 |
|
|
|a s.l.
|b Johns Hopkins University - International Food Policy Research Institute,
|c s.f.
|
700 |
1 |
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|a Hazell, Peter B. R.
|e ed.
|
905 |
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|a 33860
|
942 |
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|c LIB
|
999 |
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|c 1684
|d 1684
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