Flux-Limits for Cosmic TeV Gamma Ray Emission Recorded by the University of Durham Telescopes Bowden, C. C. G. ; Bradbury, S. M. ; Brazier, K. T. S. ; Carramiñana, A. ; Chadwick, P. M. ; Dipper, N. A. ; Edwards, P. J. ; Lincoln, E. W. ; McComb, T. J. L. ; Orford, K. J. ; Rayner, S. M. ; Turver, K. E. Abstract Publication: International Cosmic Ray Conference Pub Date: August 1991 Bibcode: 1991ICRC....1..424B