Riviera Hotel and Con- ference Center, Las Vegas, NV. Cospon- sored by SEM and Union College. Contact SEM, 7 School St., Bethel, CT 06801; {203) 790-6373. December 8-13, 1991. 3RD MA- CHINERY MONITORING & DIAG- NOSTICS CONFERENCE AND EXHIBIT. Riviera Hotel and Con- ference Center...