NORPAC EXPLORATION SERVICES, INCORPORATED Denver firm plans to concentrate on international and marine seismic exploration in 1982. RMN Ap 17, 1982 p.93 History of rapid growth company. RMN Ag 22, 1982 p.88,90 Gets $1.7 million pact with Peruvian government. RMN Ja 21, 1983 p.67 To be bought by Petrolane, Inc. RMN Ap 26, 1984 p.86