(美)Robert F. Weaver著 (美)Robert C. Seacord著 (美)Robert A. Davis著 (美)Robert A.Pease著 (美)Robert C. Seacord (美)Robert L.Ziegler著 （美）Robert F.Weaver著 (美) Robert C. Seacord著 (美)Robert F. Bruner 著 (美)Robert G.Gallager著