TY  - BOOK
AU  - Davidoff,Philip G.
AU  - Davidoff,Doris S.
TI  - Worldwide tours: a travel agent's guide to selling tours 
SN  - 0139648917
U1  - 338.4791 
PY  - 1990///
CY  - Englewood Cliffs, NJ.
PB  - Prentice Hall
KW  - Package tours
KW  - Travel agents
ER  -