Publications 1990 LABORATORY DETECTION OF PROPADIENYLIDENE, H2CCC J. M. Vrtilek, C. A. Gottlieb, E. W. Gottlieb, T. C. Killian, and P. Thaddeus Astrophysical Journal Letters, 364: L53-L56, 1990 link to paper LABORATORY DETECTION OF A SECOND CARBON CHAIN CARBENE: BUTATRIENYLIDENE, H2CCCC T. C. Killian, J. M. Vrtilek, C. A. Gottlieb, E. W. Gottlieb, and P. Thaddeus Astrophysical Journal Letters, 365: L89-L92, 1990 link to paper ROTATIONAL SPECTRA OF CARBON 13 AND VIBRATIONALLY EXCITED SiC R. Mollaaghababa, C. A. Gottlieb, J. M. Vrtilek, and P. Thaddeus Astrophysical Journal Letters, 352: L21-L23, 1990 link to paper