FORKST mSTKIBl'TION 



ty northwestern South Dakota. Hull. S. I). (Jeol. Surv. (5: 1-126. 

 /,/. /-'>. .Mr 1914. 



69. \V\KD. I.KSTKK F. Status of tlif meso/oic floras of the 

 Cuited Stairs. .Mono- d. S. (Jeol. Surv. 48: 1-616. />/. /-/W. 



7<). \Yeat her l>ureau. Summary of the climatolo-ical data 

 (,f ih,. I'uitcd Slates by sections. 26: 1-4. /. l-:2. 27: 1-7. /'. 

 28: 1-7. /'. !->. :): 1-7. /. 1-2. 30: 1-6. /. 1-2. 



71. WKAVER, J. E. A study of the vegetation of southeast- 

 ern Washington. I'niv. Xeh. Studies 17: 1-114. /'. 1-48. .Ja 1917. 



72. \VK\VKK, J. E. and THIEL, A. 11 Ecological studies in 

 the tension /.one between prairie and woodland. I'm!. Surv. Nel>. 

 \s 1. 1 : 1-57. /'. 1.-38. Ap 1917. 



7: 1 ,. YYiiiTFORD, II. N. The forests of the Flathead Valley. 

 M..t. (ia/, :W: 99-122. P. 1 94-21 S. Mr. 27(i-2!)(i. A p. /'. 1-23. 

 1905. 



74. ZON, RAPHAEL, and (CRAVES, H. S. Li.uht in relation 

 to tree growth. Hull. Kor. Serv. U. S. Dept. Arrir. 92: L-59, 

 /'. t-10. .! 1911. 



76. /<>\. liAi'HAEL. Seed production of Western white pine. 

 Hull. 1 T . S. I) ( .pt. Agric. 210: 1-15. Ap 1915. 



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