Erratum - a Deep Optical Search of the 1979APR6 Gamma-Ray Burst Error Box Chevalier, C. ; Ilovaisky, S. A. ; Motch, C. ; Barat, C. ; Hurley, K. ; Vedrenne, M. ; Niel, G. ; Laros, J. G. ; Evans, W. Doyle ; Fenimore, E. E. ; Klebesadel, R. W. ; Estulin, I. V. ; Zenchenko, V. Abstract Publication: Astronomy and Astrophysics Pub Date: November 1981 Bibcode: 1981A&A...103..428C