Harper, John L.
| 1980 | "A study of flood-hazard perception, Arcata Bottoms area, Mad River floodplain, Humboldt County, California" in Humboldt Journal of Social Relations |
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| 1980 | "A study of flood-hazard perception, Arcata Bottoms area, Mad River floodplain, Humboldt County, California" in Humboldt Journal of Social Relations |