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branch orders and tolerance. Jour. Forestry 20: 448-462. 1922. 



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the effect of light on tree geowth. Minn. Forester 1 : 89-90. 1908. 



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light in the forest. Amer. Forests and Forest Life 31 : 330-334, 376-377, 

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some aspects of light in the forest. Yale Univ. School Forestry Bull. 

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limiting factors in relation to specific ranges of tolerance of forest 

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the intolerance of western yellow pine regarded as a regulating factor 

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the other SIDE of the light question. Jour. Forestry 27 : 807-812. 1929. 



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light and darkness in a tropical forest. Nat. Hist. 27: 474-484, illus. 

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light requirements and siLvicuLTURAL practice. Jour. Forestry 27 : 535- 

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some further considerations regarding the tolerance and intolerance 

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the light requirements of forest trees and the methods of measuring 

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