APHA. 1990. Standard Methods for the Examination of Water and Wastewater Brandt, Roger. 1992. Survey of ponds in Crater Lake NP and their response to the lowest record of precipitation in the history of this park. National Park Service, Crater Lake National Park. 16 pp.

Hickman, James C. Ed. 1993. The Jepson manual. University of California Press, Berkeley, CA. 1400 pp.

Hitchcock, C. L., and A. Cronquist. 1973. Flora of the Pacific Northwest. Univ. Washington Press, Seattle. 730pp.

Jones, C. 1993. In Crater Lake Limnological Studies Final Report., Cooperative Park Studies Unit, Technical Report NPS/PNROSU/NRTR-93/03. 722 pp.

Larson, G.L, 1993. Crater Lake Limnological Studies Final Report, Cooperative Park Studies Unit, Technical Report NPS/PNROSU/NRTR-93/03. 722 pp.

Natural History Magazine, Sept 1994, Munz, Philip A. 1968. A California flora with supplement. University of California Press, Berkeley, CA. 1905 pp.

Salinas, J. 1992. Standard operating procedures for the monitoring program at Crater Lake, Oregon. U.S. Department of Interior, crater Lake National Park, Crater Lake, Oregon. 43 pp.