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Article Contents

ABSTRACT

1.INTRODUCTION

2.THE NUCLEAR REGION: HI ABSORPTION MEASUREMENTS

2.1.The Puzzle

3.OBSERVATIONS

4.GALAXIES WITH BROAD HI ABSORPTION LINES

4.1.The Group of Nearby Starburst Galaxies

4.2.Strongly Interacting Galaxies

4.3.Other Galaxies with HI Absorption Lines

5.A GLOBAL MODEL

REFERENCES