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Keld S. Dueholm

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Geologic Mapping of Tunnels Using Photogrammetry--Camera and Target Positioning: USGS Open-File Report 90-49
Geologic Mapping of Tunnels Using Photogrammetry--Camera and Target Positioning Usgs Open-File Report 90-49 - Scholar's Choice Edition
The generic bundle adjustment: USGS Open-File Report 89-185