Technical Commentary: Is Research Keeping Up with the Needs of Douglas-Fir Tree Improvement Programs?

Author： Adams W. T. Johnson G. Copes D. L. Daniels J. Quam R. G. Heaman J. C. Weber J.

Publisher： Society of American Foresters

ISSN： 0885-6095

Source： Western Journal of Applied Forestry, Vol.5, Iss.4, 1990-10, pp. : 135-137

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