E. D. Dorrell ; with a contribution by J. R. O. Collin. D. E. Turnbull ; with contributions by J. K. Royle, B. S. Nau. D. Zissos ; with contributions by J. C. Bathory. D. Zissos, with contributions by J. C. Bathory. Philip Ball ; with a contribution by Dirk Helbing. Josef Novak ; with a contribution by Piet A. Leclercq. Mary Lou Moore, with a contribution by Ora Strickland. Paul E. Green, with contributions by J. Douglas Carroll. [by] K. C. Bowen with contributions by Janet I. Harris. David A. Watt ; with a contribution by Muffy Thomas.