Ch. 14] REFERENCES 273 



Canadian Inst. Mining and Metallurgy, vol. 50, pp. 487-496; Canadian Mining 

 and Metallurgy, Bull. 425, Sept. 1947. 



Obruchev, V. (1945). Eternal frost: the frozen soil of northern Russia and 

 Siberia: Natl. Rev., vol. 124, pp. 220-227. 



■ (1946). The fifteenth anniversary of the ground frost study of the Acad- 

 emy of the U.S.S.R.: Priroda, No. 5. (Translated by Stefansson Library.) 



Orstrand, C. E. Van (1939). Observed temperatures in the earth's crust: Chap. 

 VI, Physics of the earth; Chap. VII, Internal constitution of the earth. 



Patty, E. N. (1945). Placer mining in the sub-arctic: Western Miner, vol. 18, 

 No. 4, pp. 44-49. 



Perutz, M. F. (1948). A description of the iceberg aircraft carrier and the bear- 

 ing of the mechanical properties of frozen wood pulp upon some problems of 

 glacier flow : Jour. Glaciology, vol. 1, No. 3, pp. 95-102. 



Pewe, Troy L. (1948a). Origin of the Mima Mounds: Sci. Monthly, vol. 66, No. 

 4, pp. 293-296. 



(1948b). Ground-water data for Fairbanks, Alaska: Manuscript on open 



file, U. S. Geological Survey, Washington, D. C. 



(1949). Preliminary report of permafrost investigations in the Dunbar 



area, Alaska: U. S. Geol. Survey, Circ. 42, 3 pages. 

 Poser, Hans (1947a). Dauerfrostboden und Temperatur verhaltnisse wahrend 

 der Wiirm-Eiszeit im nicht vereisten Mittel- und Westeuropa: Naturwiss., 

 Jahrg. 34, pp. 1-9. 



(1947b). Aufbautiefe und Frostzerrung im boden Mitteleuropas wahrend 



der Wiirm- Eiszeit: Naturwiss., Jahrg. 34, pp. 232-238, 262-267. 



*Pryor, W. T. (1947). Aerial surveying on the Alaska Highway, 1942: Public 



Roads, vol. 24, No. 11, pp. 275-290. 

 Raup, H. M. (1941). Botanical problems in Boreal America: Bot. Rev., vol. 7, 



pp. 147-248. 



(1947). The botany of southwestern Mackenzie: Sargentia VI. 



Richmond, Gerald M. (1949). Stone nets, stone stripes, and soil stripes in the 



Wind River Mountains, Wyoming: Jour. Geol., vol. 57, No. 2, pp. 143-153. 

 Rockie, W. A. (1942). Pitting on Alaska farm lands: a new erosion problem: 



Geog. Rev., vol. 32, pp. 128-134. 

 Schafer, J. P. (1949). Some periglacial features in central Montana: Jour Geol., 



vol. 57, No. 2, pp. 154-174. 

 Shannon, W. L., and Wells, W. A. (1947). Tests for thermal diffusivity of 



granular materials: Presented 50th annual meeting American Society for Test- 

 ing Materials, June 16-20, 1947. 

 Sharp, R. P. (1942a). Ground-ice mounds in tundra: Geog. Rev., vol. 32, No. 3, 



pp. 417-423. 

 * (1942b). Soil structures in the St. Elias Range, Yukon Territory: Jour. 



Geomorphology, vol. 5, pp. 274-301. 

 Shelesnyak, M. C. (1948). History of the Arctic Research Laboratory, Point 



Barrow, Alaska: Arctic, vol. 1, No. 2, pp. 97-106. 

 Smith, H. T. IT. (1949a). Periglacial features in the driftless area of southern 



Wisconsin : Jour. Geol, vol. 57, No. 2, pp. 196-215. 

 * (1949b). Physical effects of Pleistocene climatic changes in nonglaciated 



areas — eolian phenomena, frost action, and stream terracing: Bull. Geol. Soc. 



Amer., vol. 60, pp. 1485-1516. 



