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|a Instituto Colombiano de Normas Técnicas y Certificación (Icontec)
|
| 243 |
1 |
0 |
|a Normas técnicas
|
| 245 |
1 |
0 |
|a Gestión ambiental :
|b análisis de aire : verificación de las mezclas de gases para calibración por el método de comparación Environmental management : air analysis : checking of calibration gas mixtures by comparison method /
|c ICONTEC.
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| 246 |
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7 |
|a NTC 3901
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| 246 |
3 |
1 |
|a Environmental management
|b air analysis : checking of calibration gas mixtures by comparison method
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| 260 |
|
|
|a Bogotá :
|b Icontec,
|c 1996.
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| 300 |
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|a 5 páginas ;
|c 30 cm.
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|a Contaminación del aire
|x Mediciones
|v Normas técnicas
|2 Armarc
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