1. INTRODUCTION  
2. OBSERVATIONS  
3. CONTINUUM RESULTS  
4. MORPHOLOGY OF DENSE MOLECULAR GAS  
5. KINEMATICS OF DENSE MOLECULAR GAS  
6. DENDROGRAM ANALYSIS OF $\mathbf{N}_{2}\mathbf{H}^{+}$  
7. A CONNECTION BETWEEN SIZE-LINEWIDTH RELATIONS AND CLOUD STRUCTURE  
8. SUMMARY  