This is the definitive CLASS paper on lens-candidate selection and followup. The entire CLASS team are authors of the paper. Although I didn't do much actual observing for CLASS, my main input into the observational side of things was to make sure that the sample and lens-candidate selection were as well defined as possible, even if that meant excluding some known lenses from the sample, recalibrating all the observations etc. The survey itself, i.e. before lens-candidate selection and followup, is described here.
The links below point to one file containing the complete text, all figures and tables etc.
As are most of my publications this is available in two forms: