Davidoff, Philip G. <br/><br/>
Worldwide tours  a travel agent?s guide to selling tours 
Philip G. Davidoff, Doris S. Davidoff 
 - New Jersey  Prentice Hall  c1990 
 - vii, 82 p.  ill., maps  28 cm. 
<br/><br/><label>ISBN: </label>0139648917 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Package tours.