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Multilingual
21
Rees, Michael, 005.13-R328p | Addison-Wesley Publishing Company | 1988 005.13-R328p,
22
Stipanuk, David M., 591.901-S859w | Educational Institute of the American Hotel & Motel Association | 1995 591.901-S859w,
23
Robson, W W., 840.9-R667m | Oxford University Press | 1984 840.9-R667m,
24
Robson, W W., 809-R667d | Cambridge University Press | 1982 809-R667d,
25
Schwartz, Seymour I, 514.059-S399y | Mosby Year Book | 1991 514.059-S399y,