Packaging Corporation of America Emerson Carey, Jr. to become head of giant packaging industry. Post June 19, 1959, p.41 Completes $1 million expansion program at 5501 Brighton Blvd. Post Sept. 13, 1964 p.85 Douglas F. Cox of Littleton named president of Denver firm. Post Je 6, 1965 p.106 Dallas firm buys paperboard mill from Commerce City com pany RMN D 30, 1983 p.61