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\bibitem{deGraauw_etal2005} de Graauw, T., Caux, E., Guesten, R., Helmich, F., Pearson, J., Phillips, T. G., et al. (2005). The Herschel-heterodyne instrument for the far-infrared (HIFI). In \textit{Bulletin of the American Astronomical Society} (1219). Bulletin of the American Astronomical Society, 37.

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