Ch. 14] REFERENCES 275 



Wallace, R. E. (1948). Cave-in lakes in the Nebesna, Chisana, and Tanana 

 River valleys, eastern Alaska: Jour. Geol., vol. 56, No. 3, pp. 171-181. 



Washburn, A. L. (1947). Reconnaissance geology of portions of Victoria Island 

 and adjacent regions, arctic Canada: Geol. Soc. Amer., Mem. 22, 142 pages. 



Weinberg, B. P. (1940). Studies on eternally frozen ground and on freezing of 

 soil: Trans. Amer. Geophys. U., vol. 21, pp. 770-777. 



Weinberger, L. (1944). Frostspalten und Froststrukturen in Schottern bei Leip- 

 zig : Geol. Rundsch, Bd. 34, pp. 539-544. 



Werenskiold, W. (1923). Frozen soil in Spitzbergen: Abstract in Monthly 

 Weather Rev., vol. 51, p. 210. 



Wilkerson, A. S. (1932). Some frozen deposits in the gold fields of interior 

 Alaska: Amer. Mus. Nat. Hist. Novitates, 525, 22 pages. 



Wilson, Walter K., Jr. (1948). The problem of permafrost: Military Engr., 

 vol. 40, No. 270, pp. 162-164. 



Wimmler, N. L. (1927). Placer-mining methods and costs in Alaska: U. S. Bur. 

 Mines, Bull. 259, pp. 37-40. 



Woods, K. B., et al. (1948). Use of aerial photographs in the correlation between 

 permafrost and soils: Military Engr., vol. 40, pp. 497-499. 



Young, Jacob W. (1918). Ground frost in Alaska: Eng. and Mining Jour., vol. 

 105, No. 7, pp. 338-339. 



*Zeuner, F. E. (1945). The Pleistocene period — its climate, chronology, and 

 faunal successions: The Ray Society, London, 322 pages. 



* (1946). Dating the past: Methuen and Co., Ltd., London, 444 pages. 



* Zhukov, V. F. (1946). The earthworks during the laying of foundations in the 

 permafrost region: Obruchev Inst, of Permafrostology, pp. 3-130, Moscow-Len- 

 ingrad. (Translated by Stefansson Library.) 



