Shadwell, Thomas      frey50        <br/><br/>
The dinosaur trackers 

 -  Harper  1991 
 - 138p. 
 - Robert Silverberg's time tours; v.4 . <br/><br/> Roy Jones a Time Courier, encounters nothing but trouble when he leads a tour back to the Age of Reptiles.               
<br/><br/><label>ISBN: </label>0-06-106053-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science Fiction<br/>Space and time--Fiction<br/>fantastic fiction<br/>Dinosaurs--Fiction<br/>Reporters and reporting--Fiction