17th Northeastern Forest Tree Improvement Conference (1969)
Pennsylvania State University. University Park, Pennsylvania. August 4-6, 1969.
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The Pennsylvan Tree Improvement Program
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Phenotypic Variation in Sugar Maple in Relation to Altitude
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Technique of Producing Silver Maple Seed Under Greenhouse Conditions
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Multiple Witches Broom- A New Type of Abnormality in Scotch Pine (Pinus Sylvestrius)
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The Effect of Lammas Shoot Growth on the Stem Form of Young Scotch Pine
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Studies With Douglas-Fir Seed and Exotic Conifers for Christmas Tree Production
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Pitch Pine: A Literature Review
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Performance of Fifty-Five Seedlots of Scotch Pine at Two Locations in New York
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Shade Tree Improvement Research: Goals and Limitations
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