506 MISC. PUBLICATION 3 64, U. S. DEPT. OP AGRICULTURE 

 Thblen, Rolf. (10043) 



AERTAL PHOTOGRAPHY AND NATIONAL FOREST MAPPING. J0U1\ Forestry 17 '. 



515-522, illus. 1919. 



Tilt, L. C. (10044) 



cruising mahogany in central America. Canad. Forestry Jour. 15 (8-9) : 

 345-347, illus. 1919. 



Tryon, H. H. (10045) 



proven methods of timber estimating. Lumber Trade Jour. 80 (9) : 31-32, 

 illus. 1921. 



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timber estimating and mapping of today. South. Luuibermau 1390 I 47. 



1922. 



United States Forest Service. (10047) 



INSTRUCTIONS FOR MAKING FOREST SURVEYS AND MAPS. EdS. 1905, 1907, 1909, 



l&ll. Washington, D. C. 1905-12. 



(10048) 



INSTRUCTIONS FOR MAKING TIMBER SURVEYS IN THE NATIONAL FORESTS; INCLUD- 

 ING standard classification of forest types. Rev., 45 pp. Washington, 

 D. C. 1925. 



(10049) 



manual for timber reconnaissance, 1914. 63 pp., illus. Missoula, Mont. 



1914. 



Wackerman, A. E. (10050) 



some do's and don't's in making a forest survey. Minn. Univ. Forestry Club, 

 Gopher Peavey 1928: 58-61. 1928. 



Walcott, C. D. (10051) 



WORK OF THE GEOLOGICAL SURVEY IN MAPPING THE RESERVES. Amei\ Forestry 



Cong. Proc. 1905: 364-380. 1905. 



Ward, W. J. (10052) 



"average log" cruise. Forestry Quart. 5 : 268-277. 1907. 



Welden, Neil. (10053) 



timber cruising on a private operation in the pacific northwest. ames 

 Forester 11 : 81-88, illus. 1923. 



Whittle, C. A. (10054) 



estimating standing timber. Ga. Forest Serv. Leaflet 5, 8 pp., illus. 1929. 



WlCKENDEN, H. R. (10055) 



forest surveys. Pulp and Paper Mag. 23 (43) : 1224-1226, 1229-1230, 1237, 

 illus. 1925. 



(10056) 



THE PARTIAL COUNT METHOD OF TIMBER ESTIMATING. JOUT. Forestry 22 : 518- 



528, illus. 1924. 



Wilber, C. P. (10057) 



aerial forest surveys. Pa. Dept. Forests and Waters ' Bull. 39 : 79-85. 

 1929. 



WlLDKSTROM, STIG. (10058) 



SAMPLE PLOT METHOD OF THE MINNESOTA LAND ECONOMIC SURVEY FOR DETER- 

 MINING growth and yield. Jour. Forestry 28 : 734-738. 1930. 



Wilson, Ellwood. (luooy) 



AERIAL PHOTOGRAPHY IN FORESTRY, LOGGING AND ENGINEERING. Paper IndUS. 



6 (7) : 1207-1213, illus. 1924. 



(10060) 



aerial timber cruising. Internatl. Aeronautics 1 (1) : 12-19, illus. 1923. 



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THE AEROPLANE AND AERIAL PHOTOGRAPHS IN FORESTRY WORK. Forestry Chl'On. 



4 (4) : 23-25. 1928. 



(10062) 



FOREST MAPPING AND ESTIMATING FROM AERIAL PHOTOGRAPHS. J0UI\ Forestry 



20 : 113-116, illus. 1922. 



