The NRAO 5-GHz radio source survey. II. The 140-ft "strong", "intermediate", and "deep" source surveys. Pauliny-Toth, I. I. K. ; Kellermann, K. I. ; Davis, M. M. ; Fomalont, E. B. ; Shaffer, D. B. Abstract Publication: The Astronomical Journal Pub Date: May 1972 DOI: 10.1086/111278 Bibcode: 1972AJ.....77..265P