The Christmas Tree:
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 References

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Albers, H. H., and Davis, A. K. 1997. The wonderful world of Christmas trees. 100 pages. Mid-Prairie Books, Parkersburg, Iowa.

Anonymous. 1996. Gallup poll shows real tree use surged in 1995. American Christmas Tree J. 40(2): 13.

Anonymous. 1999a. NCTA public opinion survey supplies upbeat information. Christmas Tree Lookout 32(2): 22-24.

Anonymous. 1999b. Christmas trees rank high in Oregon. Christmas Tree Lookout 32(3): 8.

Baumann, D. 1996. The Gallup poll revisited. American Christmas Tree J. 40(3): 5-6.

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Benson, D.M., Grand, L.F., and Suggs, E.G. 1976. Root rot of Fraser fir caused by Phytophthora drechsleri. Plant Dis. Rep. 60:238-240.

Benson, D. M., Hinesley, L. E., Frampton, J., and Parker, K. C. 1997a. Evaluation of six Abies spp. to Phytophthora root rot caused by Phytophthora cinnamomi. APS Biological and Cultural Tests 13: 57.

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Brown, K. 1990. A few outstanding noble fir Christmas trees. Christmas Tree Lookout 23(3): 22-23.

Brown, K. and Landgren, C. 1995. Results of the second noble fir Christmas tree provenance test. Christmas Tree Lookout 28(1):10-15.

Chastagner, G. A. 1990. Keeping cut trees fresh – A summary of tree keepability research at Washington State University. Christmas Tree Outlook 23(3): 32-44.

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Chastagner, G. A, Hamm, P. B., and Riley, K. L. 1995. Symptoms and Phytophthora spp associated with root rot and stem canker of noble fir Christmas trees in the Pacific Northwest. Plant Disease 79: 290-293.

Cooley, S.J., Hamm, P.B. and Hansen, E.M. 1988. Susceptibility of Northwest conifers to Phytophthora root rot. Tree Planters’ Notes 40:15-18.

Davidson, E. 1999. Ten day visit provides revealing snapshot of Irish tree business. Christmas Tree Lookout 32(2): 30-32.

Davis, A. K. 1996. The history of the Christmas tree industry in North America. American Christmas Tree J. 40(4): 5-11.

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Douglas, B.S. 1983. Report on the 1982 marketing season. Northwest Lookout 16(2):2-6.

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Kerwin, J. 1994. A New Yorker searches for the most imperfect perfect Christmas tree. The Pennsylvania Horticultural Soc.Green Scene 23(2): 4-7.

Koelling, M. R. 1999. Assuring there will be customers for real trees. American Christmas Tree J. 43(1): 26-31.

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Tompkins, D. 1999b. Growing trees by computer and other innovations from England. American Christmas Tree J. 43(4): 32-34.

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