@misc{indiciae9c68856642bc, title = {Formaldehyde absorption toward W51}, author = {Kogut, A. and Smoot, G. F. and Bennett, C. L. and Petuchowski, S. J.}, year = {1989}, url = {https://ntrs.nasa.gov/citations/19900029167}, note = {Source identifier: 19900029167} }