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Subject
- atomic spectroscopy[remove]9
- chemical abundances2
- diffuse molecular clouds1
- galaxies4
- h i line emission1
- h ii regions1
- infrared photometry1
- interstellar medium3
- late-type stars2
- line intensities3
- m stars1
- narrow band photometry9
- optical astronomy1
- photometry1
- quasars1
- radial velocity1
- redshifted3
- seyfert galaxies1
- spectroscopy6
- stellar flares1
