Dynamical Collapse in W51 Massive Cores: NH3 Observations Dynamical Collapse in W51 Massive Cores: NH Observationsv. 488241Zhang, Qizhou and Ho, P. T. P. 1997. "Dynamical Collapse in W51 Massive Cores: NH3 Observations." The Astrophysical Journal, 488 241.More...ID: 130575Type: articleKeywords: SAO