The CLASS survey

Original site: Westerbork Northern Sky Survey (WENSS) at 327~MHz, to define a sample which reaches a lower flux level than the JVAS survey. 3000 sources with a spectral index flatter than 0.6 have already been observed with the VLA and more observations are in progress.

this text was from http://www.jb.man.ac.uk/~njj/glens/