Publications 1991 ASTRONOMICAL DETECTION OF H2CCC J. Cernicharo, C. A. Gottlieb, M. Guelin, T. C. Killian, G. Paubert, P. Thaddeus, and J. M. Vrtilek Astrophysical Journal Letters, 398: L39-L41, 1991 link to paper MILLIMETER-WAVE SPECTRUM OF HIGHLY VIBRATIONALLY EXCITED SiO R. Mollaaghababa, C. A. Gottlieb, J. M. Vrtilek and P. Thaddeus Astrophysical Journal Letters, 368: L19-L22, 1991 link to paper ASTRONOMICAL DETECTION OF H2CCCC J. Cernicharo, C. A. Gottlieb, M. Guelin, T. C. Killian, P. Thaddeus, and J. M. Vrtilek Astrophysical Journal Letters, 368: L43-L45, 1991 link to paper OBSERVATIONS OF CUMULENE CARBENES, H2CCCC AND H2CCC, in TMC-1 Kentarou Kawaguchi, Norio Kaifu, Masatoshi Ohishi, Shin-ichi Ishikawa, Yasuhiro Hirahara, Satoshi Yamamoto, Shuji Saito, Shuro Takano, Akinori Murakami, J. M. Vrtilek, Carl A. Gottlieb, Patrick Thaddeus, and William M. Irvine Publications of the Astronomical Society of Japan, 43: 607-619, 1991 link to paper