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McCarthy, M.C.; Fuchs, G.W.; Kucera, J.; Winnewisser, G.; Thaddeus, P., Rotational spectra of C[sub 4]N, C[sub 6]N, and the isotopic species of C[sub 3]N, J. Chem. Phys., 2003, 118, 8, 3549, https://doi.org/10.1063/1.1534104 . [all data]