Werner04

M. W. Werner, K. I. Uchida, K. Sellgren, M. Marengo, K. D. Gordon, P. W. Morris, J. R. Houck, and J. A. Stansberry“New Infrared Emission Features and Spectral Variations in NGC 7023,” The Astrophysical Journal Supplement Series, 2004, 154(1), 309. DOI: 10.1086/422413