Mud volcano trail
Subtitle: Yellowstone National Park
Contributors: United States. National Park Service
Publisher: Yellowstone Library and Museum Association, in cooperation with the National Park Service, U.S. Dept of  the Interior
Place of publication: [Yellowstone National Park]
Language: eng
Number of pages: 12
Subjects: Mud volcanoes; Trails
Notes: Cover title.

cat 20110317 gdj