Originally published as: Squirrels threaten clarity of Crater Lake: spring 42 and nitrogen sources from animal activity at Rim Village; ([Crater Lake, Or. : United States Department of Interior, National Park Service, Crater Lake National Park, 1992.]); [9 p.] : 28 cm.
Date Original
[1992]
Date Digitized
2008-12-23
Date Available
2009-02-16
Original Publisher
United States Department of Interior, National Park Service, Crater Lake National Park
