Multi-wavelength study 16 Stars 12 Molecular gas 10 H II regions 8 HII regions 8 ISM: clouds 8 Stars: formation 8 All-sky survey 6 Clouds 6 Interstellar mediums 6 Ionization of gases 6 Molecular shells 6 Star formations 6 Surveys 6 Young stellar objects 6 stars: formation 6 ISM : clouds 4 ISM: Kinematics and dynamics 4 ISM: kinematics and dynamics 4 Infrared emissions 4 Ionized gas 4 Massive stars 4 Molecular clumps 4 Molecules 4 Point sources 4 Radio continuum 4 Spectrum analysis 4 Age differences 2 Angular resolution 2 Astronomy 2