1. π−pElastic Scattering Near 180° at 8 and 16 GeV/c
2. p̄p elastic scattering at 8 and 16 GeV/c;Birnbaum,1968
3. See also fig. 9 of the review of Two-Body Processes by G. Bellettini, p. 334 of the Proceedings.
4. Conf. on Hadron interactions at high energy;Derrick,1968
5. A. S. Carroll, J. Fischer, A. Lundby, R. H. Phillips, C. L. Wang, F. Lobkowicz, A. C. Melissinos, Y. Nagashima, C. A. Smith and S. Tewksbury, Phys. Rev. Letters, to be published.