(美)Robert E. Moyer编著 (美)Robert A. Young著 (美)Robert F.Weaver著 (美)Robert J.Weber著 (美)Robert N.Myhre著 (美) Albert F. Cutter编著 (美)Robert Love著 (英)Robert Heller编著 (美)Robert A. Dahl著 (美)Robert A.Pease著