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 Hitchcock, E. (6672) 



THE EROSIONS OP THE EARTH'S SURFACE, ESPECIALLY BY RIVERS. Smithsn. 



Contrib. to Knowledge 9: 79-127, illus. 1857. 



Hobley, C. W. v (6673) 



soil erosion: a problem in human geography. Geogr. Jour. 82: 139-150, 

 illus. 1933. 



Hoffman, M. H m and Turner, A. W. (6674) 



the prevention of soil erosion. Iowa Agr. Col. Ext. Bulls. 73 and 74, 



illus. 1920. 



The subjects discussed are: Pt. I, Treating Hillside Ditches; and pt. II, 

 Checking Overfalls. 



Hopkins, P. L. (6675) 



A SUMMARY OF THE RECENT RESULTS OF ENGINEERING EXPERIMENTS IN SOIL 

 AND WATER CONSERVATION AT THE BLACKLAND SOIL EROSION EXPERIMENT 



station, temple, texas. Southwest Soil and Water Conserv. Conf. 

 Proc. 6: 24-27. 1935. 



Howard, I. M. (6676) 



changes on the old chisholm trail. Amer. Cattle Producer 18 (1): 3-5, 

 illus. 1936. 



Hoyt, K. K. (6677) 



MANY ECONOMIC PROBLEMS INVOLVED IN PROPOSED CHANGES IN PUBLIC LAND 



POLICY: FUTURE OF LAND RECLAMATION WORK IS AN IMPORTANT PROBLEM 



CONTROL OF EROSION INVOLVED IN THE AMOUNT OF GRAZING PERMITTED. 



Engin. News-Rec. 103: 427-429, illus. 1929. 

 Hoyt, W. G. (6678) 



EROSION AND WATERSHED PROTECTION. A RESUME OF THE PROBLEM IN ITS 



practical aspects. Civ. Engin. 4 (2): 81-84, illus. 1934. 



Hutton, J. G. (6679) 



soil erosion and soil ruin in south Dakota. Amer. Soil Survey Assoc. 

 Bull. 16: 123. 1935. 



Jaggar, T. A. (6680) 



EXPERIMENTS ILLUSTRATING EROSION AND SEDIMENTATION. Harvard Univ. 



Mus. Compar. Zool. Bull. 49: 283-306, illus. 1908. 

 Jarvis, C. S. (6681) 



RAINFALL CHARACTERISTICS AND THEIR RELATION TO SOILS AND RUN-OFF. 



Amer. Soc. Civ. Engin. Proc. 56 (pt. 1): 3-47, illus. 1930. 



Jeffreys, H. (6682) 



problems of denudation. Physiol and Jour. Sci. 36: 179-190. 1918. 



Joel, A. H. (6683) 



SOIL CONSERVATION RECONNAISSANCE SURVEY OF THE SOUTHERN GREAT 



plains wind-erosion area. U. S. Dept. Agr. Tech. Bull. 556, 68 pp., 

 illus. 1937. 



Jones, L. A. (6684) 



engineers and the control of erosion. Agr. Engin. 13: 234-236, illus. 

 1932. 



Kellogg, C. E. (6685) 



soil blowing and dust storms. U. S. Dept. Agr. Misc. Pub. 221, 11 pp., 

 illus. 1935. 



Keyes, C. R. (6686) 



ROCK FLOOR OF THE INTERMONT PLAINS OF THE ARID REGION. Bull. Geol. 



Soc. Amer. 19: 63-92, illus. 1908. 

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EROSIONAL ORIGIN OF THE GREAT BASIN RANGES. Jour. Geol. 17: 31-37, 



illus. 1909. 



(6688) 



competency of wind in land depletion. U. S. Monthly Weather Rev. 

 45: 57-58. 1917. 



