1. Introduction

2. Observations and reduction
2.1. Observations
2.2. Data reduction and calibration

3. Radial structure

4. The color-magnitude diagrams

5. Mass functions

6. Reliability of results and comparison with previous studies

7. Statistical considerations
7.1. Limiting and core radii
7.2. Structural parameters
7.3. Mass function slopes
7.4. Mass segregation

8. Conclusions