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_aBonn, George S. _913720 |
| 245 | _aInformation resources in the envirormental sciences | ||
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_aChampaign, Ill. : _bUniversity of Illinois, _c1973 |
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_a238 p. _b: ilus. |
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_aAllerton Park Institute _v; 18 |
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_aMedio ambiente _xServicios de información. _974116 |
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_aAllerton Park Institute _v; 18 _94424 |
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