Observations of GRB070612A at calar alto. Taubenberger, S. ; Mazzali, P. ; Hillebrandt, W. ; Alves, J. ; Thiele, U. ; Pedraz, S. ; Guijarro, A. ; Alises, M. ; Pian, E. Abstract Publication: GRB Coordinates Network Pub Date: 2007 Bibcode: 2007GCN..6566....1T