Chemical Gradients in the Orion Molecular Cloud(cp) Ungerechts, H. ; Bergin, E. A. ; Carpenter, J. ; Goldsmith, P. F. ; Irvine, W. M. ; Lovell, A. ; McGonagle, D. ; Schloerb, F. P. ; Snell, R. L. Abstract Publication: Astrochemistry of Cosmic Phenomena Pub Date: 1992 Bibcode: 1992IAUS..150..271U