PI-0 PRODUCTION BY E+E- ANNIHILATION AT 14 AND 34 GEV CM ENERGY - Brandelik, R; Braunschweig, W; Gather, K; Kirschfink, F; Lubelsmeyer, K; Martyn, H; Peise, G; Rimkus, J; Sander, H; Schmitz, D; Vondratzig, A; Trines, D; et al. (1982)