1. INTRODUCTION

2. I PREVIOUS H SURVEYS AND COMPARISON WITH NGC 2903

3. NGC 2903 AND ITS ENVIRONMENT

4. OBSERVATIONS  
4.1. Observations of NGC 2903  
4.2. Beam Mapping

5. DATA REDUCTION AND PROCESSING  
5.1. Galaxy Data Reduction  
5.2. Beam Data Reduction  
5.3. Image Deconvolution and Final Cubes

6. DETECTION LIMITS AND DATA QUALITY  
6.1. Data Sensitivity  
6.2. Residual Map Errors near NGC 2903

7. RESULTS  
7.1. Basic Properties of NGC 2903  
7.2. H I Companions of NGC 2903

8. DISCUSSION

9. CONCLUSIONS