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Insect damage to white spruce cones and seeds : a factor in white spruce regeneration

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By: Bean, James L. - Prielipp, D. O. - Lake States Forest Experiment Station (Saint Paul, Minn.)

Publication info: St. Paul, Minn, Lake States Forest Experiment Station, 1961

Holding Institution: U.S. Department of Agriculture, National Agricultural Library

Subjects: Diseases and pests Insect pests Picea glauca seed cones White spruce