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2. Ahlgren, I.F., 1979. New Hope for Eastern White Pine. American Forests. Magazine of the American Forestry Association, Washington DC. September edition.
3. Albion, R.G., 1926. Forests and Sea Power: The Timber Problem of the Royal Navy 1652–1862. Cambridge, Massachusetts.
4. Heritability of resistance in progenies from blister rust-resistant Pinus monticola selections;Bingham,1959
5. Introduction to Quantitative Genetics;Falconer,1996