Hillman, Martin. <br/><br/>
Bridging a continent. 

 - London,  Aldus,  1971. 
 - 191 p.;  illus. (some col.), facsims., maps (some col.), ports. (some col.)  27 cm. 
 - Aldus encyclopedia of discovery and exploration .
<br/><br/><label>ISBN: </label>0490002277 
<br/><br/><label>LCCN: </label>72877947  
<br/><br/><label>Nat. Bib. No.: </label>B71-11375 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>West (U.S.)--Discovery and exploration--Juvenile literature.
<br/><br/><label>LC Class. No.: </label>F592  / .H54 1971 
<br/><br/><label>Dewey Class. No.: </label>978/.02