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| sources primaires (Published and unpublished records without secondary interpretation or commentary); matières premières énergétiques; document original (Published and unpublished records without secondary interpretation or commentary) | |||
| publications primaires; documents primaires; littérature primaire | |||
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| source de lumière (in atomic absorption and atomic fluorescence spectroscopy) | |||
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primary sources : 5 a las frases, 4 temas |
| Ciencias de la tierra | 1 |
| Electrónica | 1 |
| Finanzas | 1 |
| Industria energetica | 2 |