Principal rivers, roads, and canals, 1840  [electronic resource]. 
Title on title screen:  Principal rivers, roads, and canals, 1840 United States 

, Scale varies. 
 - [S.l.] :  Maps.com,  c1999. 
 - 1 online resource (1 map) 
<br/><br/><br/>Electronic reproduction. <br/>Palo Alto, Calif. : <br/>ebrary, <br/>2011. <br/>Available via World Wide Web. <br/>Access may be limited to ebrary affiliated libraries. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rivers--United States--Maps.<br/>Canals--United States--Maps.<br/>Roads--United States--Maps.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>United States--Maps.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Electronic books.
<br/><br/><label>LC Class. No.: </label>G3701.C3 1999  / .P75eb