PERMAFROST BLACK 301 



Weinbeegek, L. 



1944. Frostspalten und Froststrukturen in Schottera bei Leipzig. Geol. 

 Rundsch., vol. 34, pp. 539-544. 

 Wekenskiold, W. 



1923. Frozen soil in Spitzbergen. Abstract, Month. Weather Rev., vol. 51, 

 p. 210. 



VVlLKERSON, A. S. 



1932. Some frozen deposits in the gold fields of interior Alaska. Amer. Mus. 



Nat. Hist. Nov. No. 525, 22 pp. 

 Wilson, Walter K., Jr. 



1948. The problem of permafrost. Military Eng., vol. 40, No. 270, 



pp. 1G2-164. 



WlMMLEK, N. L. 



1927. Placer-mining methods and costs in Alaska. U. S. Bur. Mines Bull, 

 259, pp. 37-40. 

 WiTTMANN, Otto. 



*1950. Diluvialprofile mit periglazialen Erscheinungen von Chateau de Jeurre 

 zwischen Etampes und Etrechy (Seine und Oise). Neues Jahrb. 

 Geol. und Paliiontol., Monatshefte, No. 3, pp. G5-79. 

 Woods, K, B., et al. 



1948. Use of aerial photographs in the correlation between permafrost and 

 soils. Military Eug., vol. 40, pp. 497-499. 

 Young, .Jacob W. 



1018. Ground frost in Alaska. Eug. and Min. Journ., vol. 105, No, 7, 

 pp. 338-339. 

 Zeuner, F. E, 



*1945. The Pleistocene period — its climate, chronology, and faunal successions. 



322 pp. Ray Society, London. 

 *1946. Dating the past. 444 pp. London. 

 Zhukov, V. F. 



*194G. The earthworks during the laying of foundations in the permafrost 

 region. Obruchev Inst. Permafrostology, pp. 3-130. Moscow-Lenin- 

 grad. (Translated by Stefansson Library.) 



