(美)Robert Sheldon著;张为普译 (美)Robert Hoekman著 (美)Robert Quesada著 (美)Bill Sheldon[等]著 (美)Robert A. Heinlein著 (美)Robert A. Young著 (美)Robert A.Pease著 (美)Robert C. Qin[等]编著 (美)Robert C.Martin著 (美)Robert D. Lock著