LITERATURE CITED 



(1) Bredemann, G., K. Garber, P. Harteck, and Kl. A. Suhr. (U. Hamburg) 



1948. Die Temperaturabbangigkeit der Lebensdauer von Blutenpollen. 

 I Naturwiss. 34(9): 279-280. 



(2) Mirov, N. T. 



1946. Viability of pine seed after prolonged cold storage. Jour. 

 Forestry 44: 193-195. 



(3) Schubert, G. H. 



1952. Germination of various coniferous seeds. California Forest 

 and Range Experiment Station, Forest Research Note No. 

 83. Mimeo. 7 pp. 



(4) Snedecor, George W, 



1946. Statistical methods. 4th Ed. Iowa State College Press, 

 Ames, Iowa. 485 pp. 



(5) U. S. Forest Service 



1948. Woody-plant seed manual. U. S. Dept. Agr. Misc. Pub. No. 

 654. 416 pp. , illus . 



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