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- The research upon which this report is based was financed in part by the U.S. Department of the Interior, Washington, D.C., under the Mt. St. Helens Research and Development Program.1
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- This research has been supported in part by the National Science Foundation under Contract No. CCR-89-02496.1
- This work was supported in part by NSF grant number IRl-86-57316 (Presidential Young Investigator Award) .1
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