1. INTRODUCTION  
2. SAMPLE SELECTION  
   2.2. Color selection  
3. SURVEY COMPLETENESS AND CONTAMINATION  
   3.1. Completeness  
   3.2. Contamination  
4. RESULTS  
   4.1. Binned quasar luminosity function  
   4.2. Double power-law function model  
5. DISCUSSION  
   5.1. Comparison with previous measurements  
   5.2. Evolution of the quasar number density  
6. SUMMARY