Mike Resnick
David Gerrold and Michael Swanwick
Eric Flint and Harry Turtledove
Mike Resnick and Josepha Sherman
Michael Swanwick and Jack McDevitt
Mike Resnick and Lawrence Griswold
John Prebble, Mike Resnick, et al.
David Gerrold and Robert Sawyer
David Drake and Robert Silverberg
Mike Resnick and David Gerrold
Mercedes Lackey and Larry Niven
Harlan Ellison and Mike Resnick
Robert Silverberg and Kevin J Anderson
George R R Martin and McDevitt Jack