@misc{127701, author = {Francis Lovas}, title = {Recommended Rest Frequencies for Observed Interstellar Molecular Microwave Transitions - 1991 Revision}, year = {1992}, number = {21}, month = {1992-01-01}, publisher = {J. Phys. & Chem. Ref. Data (JPCRD), National Institute of Standards and Technology, Gaithersburg, MD}, language = {en}, }