1 | PCEX | Petromax Chemical Exchange, Inc. | added 7/1980; eliminated 1/1981 | | NAKINA |
2 | PCEX | Petromax Chemical Exchange, Inc. | added 7/80; eliminated 1/81 | | NRHS |
3 | PCEX | *PETROMAX CHEMICAL EXCHANGE, INC. | | | PWRC |
4 | PCEX | *GE RAIL SERVICES | | | PWRC |
5 | PCEX | Petromax Chemical Exchange (GE Rail Services) | | | RSRV |