ACKNOWLEDGMENTS

23—John G. Zimmerman
24, 25—Lee Balterman
26—John Iacano
28, 29—Photopress, Zurich
35—S. Wyss-Verlag O. Konzett-Brunner
36—Yves Debraine-LIFE
55—diagram by William Bernstein
56—Jean Marquis
81—A.P. (3), Ralph E. Worsham