1. Geology and Ore Deposits of the Front Range, Colorado;Lovering;U.S. Geological Survey Prof. Paper,1951
2. Geologic of the Straight Creek Tunnel Site, Clear Creek and Summit Counties, Colorado; and its Predicted Effect on Tunnel Construction;Robinson;U.S. Geological Survey open-file Report,1962
3. Geologic Research at the Straight Creek Tunnel Site, Colorado;Robinson;Highway Research Board, Highway Research Record,1964
4. Preliminary Report on the Engineering Geology of the Straight Creek Tunnel Pilot Bore, Clear Creek and Summit Counties, Colorado;Robinson;U.S. Geological Survey open-file Report,1965
5. Robinson C. S. and Lee F. T. Results of Geologic Research Straight Creek Tunnel Pilot Bore, Colorado, Highway Research Board, Highway Research Record. To be published.