D. O'Rourke
2 publications by D. O'Rourke:
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Removing Douglas-Fir Cones with a Lower-Crown Branch Shaker
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Publication: Tree Planters' Notes - Volume 49, Number 3 (2000)
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Field Testing a Modified Duster for Supplemental Mass Pollination in Douglas-fir Seed Orchards
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Publication: Tree Planters' Notes - Volume 46, Number 4 (1995)
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