TY  - BOOK
AU  - Harwell,Edward M.
AU  - Shaffer,Paul Franklin
TI  - The check-out operation in self-service retail food stores
AV  - S21 .A74 no. 31
PY  - 1951///
CY  - Washington, D.C.
PB  - U.S. Dept. of Agriculture, Production and Marketing Administration, Marketing and Facilities Branch
KW  - Supermarkets
KW  - Checkout counters
KW  - Self-service stores
N1  - Cover title
ER  -