1. INTRODUCTION

2. OPTICAL AND NEAR-INFRARED IDENTIFICATION

3. OPTICAL SPECTROSCOPY
3.1. VLT/VIMOS observations, data reduction & analysis
3.2. Keck/Deimos spectroscopy
3.3. Redshift measurements and source classification

4. OPTICAL/NEAR-INFRARED CATALOG OF X-RAY SOURCES IN THE E-CDF-S
4.1. Photometric redshifts

5. RESULTS
5.1. Demographics of the X-ray point-source population

6. PHYSICAL EXTENT OF LARGE-SCALE STRUCTURES

7. SUMMARY