TY  - BOOK
AU  - Vallen, Jerome J; Abbey, James R & Sapienza, Dunnovan L
TI  - The art and science of managing hotels / restaurants / institutions
SN  - 0-8104-9470-1
U1  - 647.94 Val 
PY  - 1968///
CY  - Hayden book company, New Jersey
ER  -