Parkwide road improvement plan  Yellowstone National Park, Wyoming/Montana/Idaho. 

 - Denver, Colo.  Denver Service Center, National Park Service  1992. 
 - vi, 76 p.  ill., mpas 
<br/><br/><label>LCCN: </label>doc92001062  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Roads--Maintenance and repair.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Yellowstone National Park