TY - JOUR AU - Fraser, Gerald AU - Lovas, Francis AU - Suenram, R AU - Gillies, J AU - Gillies, C C2 - Chemical Physics DA - 1992-01-01 LA - en M1 - 163 PB - Chemical Physics PY - 1992 TI - Microwave and Infrared Spectra of C2H4--HCCH: Barrier to Two-Fold Internal Rotation of C2H4 ER -