(美国)槐尔特(Wilder,L.I.)著 (美)槐尔特(Wilder，L.I.)著 (美)吉尔德(Gilder,J.H.)著 (美)怀德(Wilder,L.I.)著 ( )希尔德(Hilder,R.)著 (美)怀德(Wilder, L.I.)著