The Astrophysical Journal Letters
Volume 455
Number 1
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P. Caselli et al 1995 ApJ 455 L77 doi:10.1086/309805
Radio-astronomical Spectroscopy of the Hyperfine Structure of N2H+
FREEP. Caselli, P. C. Myers and P. Thaddeus
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Radio-astronomical Spectroscopy of the Hyperfine Structure of N2H+
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