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Porter, Pamela E., and William R. Meehan. Seasonal species composition of invertebrates in several Oregon streams In Pacific Northwest Forest and Range Experiment Station (Portland, Or.). Research Paper PNW. Vol. no.382. Portland, Or.: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1987.
→ www.fs.fed.us/pnw/pubs/pnw_rp382.pdf