(美)Robert Tolmasoff著 (美)Robert A.Pease著 (美)Robert C.Seacord著 (美)Robert Clair著 (美)Robert Hoekman著 (美)Robert Hogan著 (美)Robert Slater著 (美)Robert Tabor著 (美)Robert Vamosi著 (美)Robert Hoekman Jr.著