1. INTRODUCTION

2. SERPENS OBSERVATIONS AND DATA REDUCTION  
2.1. Observations  
2.2. Pointing and Flux Calibration  
2.3. Cleaning and Iterative Mapping  
2.4. Source Identification  

3. SERPENS RESULTS  
3.1. Source Properties  

4. SERPENS SUMMARY

5. THREE-CLOUD COMPARISON OF PERSEUS, OPHIUCHUS, AND SERPENS  
5.1. What is a Core?  
5.2. Distance Effects  
5.3. Physical Implications of Source Sizes and Shapes  
5.4. Densities and the Mass versus Size Distribution  
5.5. Fragmentation and the Core Mass Distribution  
5.6. Clustering  
5.7. Relationship to Cloud Column Density  
5.8. Efficiency of Forming Cores  

6. SUMMARY