TY  - RPRT
TI  - Low-density photodissociation regions
AU  - Hollenbach, David J.
AU  - Tielens, A. G. G. M.
AU  - Takahashi, Takamasa
PY  - 1991
UR  - https://ntrs.nasa.gov/citations/19910062679
ID  - 19910062679
ER  -