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Economics of precommercial thinning in jack pine. 1985. Smith, C.R.; Johnson, John D.; Riley, L.F. Pages 34-45 in M. Murray, editor. The yield advantages of artificial regeneration at high latitudes. Proceedings of the sixth international workshop on forest regeneration, August 10-11, 1984, Edmunston, New Brunswick. USDA Forest Service, Portland, Oregon, USA.

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