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title = {{A face-on view of the first galactic quadrant in molecular clouds}},  journal = {{ApJ}},  }  @article{Roman_Duval_2010,  doi = {10.1088/0004-637x/723/1/492},  url = {http://dx.doi.org/10.1088/0004-637x/723/1/492},  year = {2010},  month = {oct},  publisher = {{IOP} Publishing},  volume = {723},  number = {1},  pages = {492--507},  author = {Julia Roman-Duval and James M. Jackson and Mark Heyer and Jill Rathborne and Robert Simon},  title = {{{PHYSICAL} {PROPERTIES} {AND} {GALACTIC} {DISTRIBUTION} {OF} {MOLECULAR} {CLOUDS} {IDENTIFIED} {IN} {THE} {GALACTIC} {RING} {SURVEY}}},  journal = {{ApJ}},  }