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A. Crapsi et al. 2005 ApJ 619 379 doi:10.1086/426472

Probing the Evolutionary Status of Starless Cores through N2H+ and N2D+ Observations

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A. Crapsi1,2, P. Caselli3, C. M. Walmsley3, P. C. Myers2, M. Tafalla4, C. W. Lee5 and T. L. Bourke6

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