01023cam a22002891a 4500 agr51000243 DLC 20260227111015.0 770920s1951 dcuae f000 0 eng agr51000243 (OCoLC)3282039 DLC OC DNAL DLC premarc S21 .A74 no. 31 1 Ag84Ab no.31 E700 Harwell, Edward M., 1918- The check-out operation in self-service retail food stores / [by E.M. Harwell and Paul F. Shaffer]. Washington, D.C. : U.S. Dept. of Agriculture, Production and Marketing Administration, Marketing and Facilities Branch, 1951. v, 72 p. : ill. ; 26 cm. Agriculture information bulletin ; no. 31 Cover title. Supermarkets Checkout counters. Self-service stores. Shaffer, Paul Franklin, 1917- Check out operation in self service retail food stores. 11327 11327