Trading stamps Miller's Supermarkets will switch from Pioneer to King Korn stamps. RMN 0 10, 1965 p.5 Utah passes law outlawing trading stamps. Cervi's Journal Ap.14, 1955 P 1 King Soopers, Incorporated offered customer choice of trading stamps or 2% discount or. purchases. Post Ag 7, 1966 p.l discount on food bills in ii-cu. of stamps discontinued by Kir_g Soopers. Post S 9, 1966 F.1 Statistics for large chain atores. rervi's Journal S 14, 1.966 p.1, 30
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