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https://www.aanda.org/articles/aa/abs/2005/01/aa1044/aa1044.html L183 (L134N) revisited - III. The gas depletion | Astronomy & Astrophysics (A&A) the gas astronomy astrophysics l183 l134n revisited https://www.aanda.org/articles/aa/olm/2009/05/aa10587-08/aa10587-08.html Chemical modeling of L183 (L134N): an estimate of the ortho/para H ratio | Astronomy & Astrophysics...