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- [3] DETECTION OF AN ADDITIONAL HYDROGEN RECOMBINATION LINE SOURCE AT W49A POSITION ASTROPHYSICAL JOURNAL, 1975, 200 (03): : 594 - 597
- [5] Multifrequency, high-resolution radio recombination line observations of the massive star-forming region W49A ASTROPHYSICAL JOURNAL, 1997, 482 (01): : 307 - 333
- [6] HIGH-SENSITIVITY RECOMBINATION-LINE OBSERVATIONS OF W49A .1. HYDROGEN ALPHA-LINES ASTROPHYSICAL JOURNAL, 1979, 234 (01): : 162 - 167
- [7] ANOMALOUS EMISSION-LINE IN LOW-FREQUENCY RADIO SPECTRA TOWARD W49A ASTROPHYSICAL JOURNAL, 1973, 180 (03): : L113 - L116
- [8] Hard X-rays from ultracompact HII regions in W49A ASTROPHYSICAL JOURNAL, 2006, 653 (01): : 409 - 415
- [9] Water absorption from line-of-sight clouds toward W49A ASTROPHYSICAL JOURNAL, 2004, 605 (01): : 247 - 258
- [10] First detection of [C I] absorption lines toward Sgr B2 and W49A DIFFUSE INFRARED RADIATION AND THE IRTS, 1997, 124 : 251 - 254