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Article Contents

ABSTRACT

1.INTRODUCTION

2.PROPERTIES OF THE HEAVY-ELEMENT REDSHIFTS

3.PHYSICAL PROPERTIES OF THE Ly-alpha CLOUDS

4.RECENT DEVELOPMENTS ON THE Ly-alpha FOREST

5.ORIGIN OF THE HEAVY-ELEMENT REDSHIFTS

6.THE ORIGIN OF THE Ly-alpha FOREST LINES

7.NEW RESULTS ON CLUSTERING

8.QSO ABSORPTION LINES AND LARGE-SCALE STRUCTURE

9.THE QSO PAIR Q2343+1229, Q2344+1225

10.CONCLUSIONS

REFERENCES