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- [21] The Lower Gila Region, Arizona. A geographic, geologic, and hydrologic reconnaissance with a guide to desert watering places PETERMANNS MITTEILUNGEN, 1924, 70 (11-12): : 285 - 285
- [22] A geologic reconnaissance of the Iliamna region, Alaska PETERMANNS MITTEILUNGEN, 1912, 58 : 97 - 97
- [23] A geologic reconnaissance of a part of the Rampart quadrangle PETERMANNS MITTEILUNGEN, 1914, 60 : 220 - 220
- [24] Notes on a geologic reconnaissance of Mountain Province PETERMANNS MITTEILUNGEN, 1919, 65 : 114 - 115
- [25] A geologic reconnaissance of the Cuzco Valley, Peru PETERMANNS MITTEILUNGEN, 1916, 62 : 38 - 39
- [26] GEOCHEMICAL PROSPECTING APPLIED TO GEOLOGIC RECONNAISSANCE TRANSACTIONS OF THE SOCIETY OF MINING ENGINEERS OF AIME, 1964, 229 (03): : 225 - 229
- [28] Geologic reconnaissance of a part of Western Arizona PETERMANNS MITTEILUNGEN, 1910, 56 (04): : 225 - 226
- [29] A geologic reconnaissance of the Fairbanks district, Alaska PETERMANNS MITTEILUNGEN, 1914, 60 : 221 - 221
- [30] HYDROLOGIC RECONNAISSANCE OF THE WASATCH PLATEAU-BOOK CLIFFS COAL-FIELDS AREA, UTAH. US Geological Survey Water Supply Paper, 1981,