DETERMINATION OF THE TAU-LIFETIME IN HIGH-ENERGY E+E- ANNIHILATIONS by Althof, M, Braunschweig, W, Kirschfink, F, Lubelsmeyer, K, Martyn, H, Rimkus, J, Rosskamp, P, Sander, H, Schmitz, D, Siebke, H, Wallraff, W, Fischer, H, Hartmann, H, Jocksch, A, Knop, G, Kopke, L, Kolanoski, H, Kuck, H, Mertens, V, Wedemeyer, R, Wollstadt, M, Eisenberg, Y, Eskreys, A, Gather, K, Hildebrandt, M