Preliminary Report of the Geology of the Julian Region, California
The present paper is a result of field studies carried on in the Julian region during the summer and early fall of 1932. Considerable time was spent in plane table surveying to establish a control for aeroplane pictures used in part to map the geology and locate some of the mine openings. A portion...
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Donnelly, Maurice Ghirarr (1933) Preliminary Report of the Geology of the Julian Region, California. Master's thesis, California Institute of Technology. doi:10.7907/G5C6-NW08. https://resolver.caltech.edu/CaltechTHESIS:01112010-103035470 <https://resolver.caltech.edu/CaltechTHESIS:01112010-103035470>