1. CERN-Columbia-Rockfeller Group:Phys. Lett.,46 B, 471 (1973).
2. British-Scandinavian-ISR Group:Phys. Lett.,44 B, 521, 527 (1973).
3. Saclay-Strasburg Group:Phys. Lett.,44 B, 537 (1973).
4. Chicago-Princeton Group:Phys. Rev. Lett.,31, 1426 (1973).
5. NAL-Illinois Group:Phys. Rev. Lett.,32, 24 (1974).