When you visit the treasure state see Montana's State Parks featuring the world famous Lewis & Clark Cavern
Subtitle: largest system of caverns in the Pacific Northwest.
Contributors: Montana. State Parks Division.; Pacific Northwest History Collection.
Publisher: s.n.
Published: 1950
Place of publication: [s.l
Language: eng
Subjects: Lewis and Clark Cavern State Park (Mont.); Montana -- Description and travel
Notes: WSU MASC copy is: 002-115858771.