1 INTRODUCTION
2 OBSERVATIONS & DATA
2.1 Public/archival multi-wavelength data
2.2 Optical observations
2.3 Near-infrared observations
3 DATA REDUCTION & CATALOGUE PRODUCTION
3.1 Data reduction
3.2 Catalogue production
3.3 Selecting Line-emitters
4 CLASSIFYING LINE-EMITTERS
5 NUMBER DENSITIES
5.1 Method
5.2 Comparison with previous surveys
6 PROPERTIES OF LINE-EMITTERS
7 CONCLUSIONS