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01071nam a2200277 u 4500 |
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000199177 |
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20040322104236.0 |
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021118s2000 xxu ||||| eng |
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|a 0607954116
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|a 7226283
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|a Sistema de Bibliotecas de la Universidad de Costa Rica
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|a eng
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|a 363.739.420.974.86
|b W324w
|2 21
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|a Water quality in the Allegheny and Monongahela River Basins :
|b Pennsylvania, West Virginia, New York, and Maryland, 1996-98
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|a Denver, Colo. :
|b U.S. Departamento of the Interior, Geological Survey,
|c 2000.
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|a iv, 32 páginas :
|b ilustraciones a color, mapas color
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|a U.S. Geological Survey Circular
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| 650 |
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|a CALIDAD DEL AGUA
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|x ANALISIS
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|x MEDICIONES
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|a CONTAMINACION DEL AGUA
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|z CUENCA DEL RIO ALLEGHENY (ESTADOS UNIDOS)
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| 650 |
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|z CUENCA DEL RIO MONONGAHELA (ESTADOS UNIDOS)
|2 CC
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|a 22-MAR-2004 - BARQUERO SANABRIA, PAOLA
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| 917 |
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|a 18-NOV-2002 - HERNANDEZ GUZMAN, MARLIN TAYIRA
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| 916 |
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|a Centro Catalográfico
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