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| Line | Image | Collection | Title |
| 1 | HCC Maps | [Plat of Township 4 North, Range 1 West of the Humboldt Meridian] | |
| 2 | HCC Maps | [Plat of Township 4 North, Range 1 West of the Humboldt Meridian] | |
| 3 | HCC Maps | Atlas of Humboldt Co, Cal., Sheet 6 | |
| 4 | HCC Maps | Atlas of Humboldt Co., Cal., Sheet 7 | |
| 5 | HCC Maps | Soil Map, California, Eureka Sheet | |
| 6 | HCC Maps | [Elk River Watershed - map overlay] | |
| 7 | HCC Maps | [History of Rail Roads in Eureka - Arcata Area] | |
| 8 | HCC Maps | Township 5 N., Range 1 West H. M., Humboldt County, California - Page 20 | |
| 9 | HCC Maps | Township 5 N., Range 1 East H. M., Humboldt County, California - Page 33 | |
| 10 | HCC Maps | Township 6 N., Range 1 East H. M., Humboldt County, California - Page 34 | |
| 11 | HCC Maps | Humboldt Bay, United States - West Coast, California | |
| 12 | HCC Maps | Humboldt Bay, United States - West Coast, California | |
| 13 | HCC Maps | Humboldt County Urban Areas, Eureka - Arcata | |
| 14 | HCC Maps | Humboldt County Urban Areas, Eureka - Arcata | |
| 15 | HCC Maps | West Central Humboldt County | |
| 16 | HCC Maps | Humboldt Bay Area Bike Plan |