Participants

H.D. Donder, Berlin; S. Friedman, Cambridge; R. Jensen, Oxford; P. Koepke, Freiburg; M. Magidor, Jerusalem; W. Mitchell, Univerity Park; R. M. Solovay, Berkeley; L. J. Stanley, Bethlehem; M. C. Stanley, San Jose; J. R. Steel, Los Angeles; D. Velleman, Amherst; P. D. Welch, Bristol;