For works of this author written in collaboration with Robert Silverberg, search also under: Randall, Robert, 1935- For works of this author written in collaboration with Laurence M. Janifer, search also under: Phillips, Mark. For works of this author written under other names, search also under: Gordon, David, 1927-1987 Langart, Darrel T., 1927-1987 Mackenzie, Jonathan Blake, 1927-1987 McKettrig, Seaton, 1927-1987