1 INTRODUCTION

2 BRIEF SUMMARY OF PREVIOUS 21-CM ABSORPTION LINE SURVEYS

3 SAMPLE OF Mg II SYSTEMS IN FRONT OF RADIO QUASARS

4 GMRT OBSERVATIONS

5 DETAILS OF NEW 21-CM ABSORBERS

6 DETECTABILITY OF 21-CM ABSORPTION
6.1 Rest equivalent width of Mg II absorption
6.2 Mg II Doublet ratio (DR)
6.3 The W_r(Mg II λ2796)/W_r(Fe II λ2600) ratio
6.4 The W_r(Mg I λ2852)/W_r(Mg II λ2796) ratio
6.5 Milliarcsecond scale radio structure

7 REDSHIFT DISTRIBUTION OF 21-CM ABSORBERS

8 VELOCITY SPREAD OF 21-CM ABSORPTION

9 SUMMARY AND DISCUSSION