Sheana Bull ; with contributions by Mary McFarlane. Frank K. Reilly ; with contributions by Don M. Chance. Mohammad Najafi ; with contributions by Sanjiv Gokhale. Arthur H. Nilson ; with contributions by David Darwin. Stephen Marshak ; with contributions by Donald Prothero. Victor F. Veley ; with contributions by Abraham I. Pallas. Robert Q. Riley ; with contributions by Dr. Wonshik Chee. D. Zissos ; with contributions by J.C. Bathory. Joel E. Ross ; with contributions by Susan Perry. with contributions by W. Burchard.