Ground-based terahertz CO spectroscopy towards Orion J. Kawamura, T. R. Hunter, C.-Y. E. Tong, R. Blundell, D. C. Papa, F. Patt, W. Peters, T. L. Wilson, C. Henkel, G. Gol'tsman and E. Gershenzon A&A, 394 1 (2002) 271-274 Published online: 04 October 2002 DOI: 10.1051/0004-6361:20021090