1. Data from the Rubbia group presented at theXVI International Conference on High-Energy Physics (Chicago, Ill., 1972);a)F. Barbiellini, M. Bozzo, P. Darriulat, G. Diambrini Palazzi, G. De Zorzi, A. Fainberg, M. I. Ferrero, M. Holder, A. McFarland, G. Maderni, S. Orito, J. Pilcher, C. Rubbia, A. Santroni, G. Sette, A. Staude, P. Strolin andK. Tittel:Phys. Lett.,39 B, 663 (1972);b)U. Amaldi, R. Biancastelli, C. Bosio, G. Matthiae, J. V. Allaby, W. Bartel, M. M. Block, G. Cocconi, a. N. Diddens, R. W. Dobinson, J. Litt andA. M. Wetherell:Phys. Lett.,43 B, 231 (1972);c)G. Bellettini et al.: preliminary data presented at theVIII Rencontre de Moriond (1973);
2. S. R. Amendolia, G. Bellettini, P. L. Braccini, C. Bradaschia, R. Castaldi, V. Cavasinni, C. Cerri, T. Del Prete, L. Foa, P. Giromini, P. Laurelli, A. Menzione, L. Ristori, G. Sanguinetti, M. Valdata, G. Finocchiaro, P. Grannis, D. Green, R. Mustard andR. Thun:Phys. Lett. 44 B, 119 (1973);d)U. Amaldi, R. Biancastelli, C. Bosio, G. Matthiae, J. V. Allaby, W. Bartel, G. Cocconi, A. N. Diddens, R. W. Dobinson andA. M. Wetherell:Phys. Lett.,44 B, 112 (1973).
3. H. Cheng, J. K. Walker andT. T. Wu:Phys. Lett.,44 B, 97 (1973);J. K. Walker: communication at theVIII Rencontre de Moriond (1973). See alsoJ. Finkelstein andF. Zachariasen:Phys. Lett.,34 B, 631 (1971).
4. V. N. Gribov andA. A. Migdal:Yad. Fiz.,8, 1002 (1968). (Sov. Journ. Nucl. Phys.,8, 583 (1969);V. N. Gribov:Žurn. Ėksp. Teor. Fiz.,53, 654 (1967) (Sov. Phys. JETP,26, 414 (1968));V. N. Gribov andA. A. Migdal:Žurn. Ėksp. Teor. Fiz.,55, 1498 (1968) (Sov. Phys. JETP,28, 679 (1969));Yad. Fiz.,8, 1213 (1968) (Sov. Journ. Nucl. Phys.,8, 703 (1969)). See alsoM. Baker:Notes on Gribov's Reggeon Calculus, to be published; communication at theVIII Rencontre de Moriond (1973).
5. J. N. Ng andU. P. Sukhatme: University of Washington, Seattle, Wash., RLO 1388-6458.