@misc{indiciae9f4a49150d45,
  title = {Molecular clouds and galactic spiral structure},
  author = {Cohen, R. S. and Cong, H. and Dame, T. M. and Thaddeus, P.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19800066230},
  note = {Source identifier: 19800066230}
}