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call 215 651 8329 http://www.seedlingsrus.com for Hemlock Trees http://www.zone5trees.com reproduction methods in white pine-hemlock stands on light, sandy soils. Harvard Forest Bulletin 27. Harvard University, Cambridge, MA. 70 p.
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Secrest, H. C. 1943. The hemlock borer, its biology and a discussion of the factors concerned in the development of an infestation. Forest Insect Laboratory Report, Milwaukee, WI.
Smith, David Martyn. 1962. The practice of silviculture. John Wiley, New York. 578 p.
Stearns, F. 1951. The composition of the sugar maple-hemlock-yellow birch association in northern Wisconsin. Ecology 32:254-265.
Tubbs, Carl H. 1977. Manager's handbook for northern hardwoods in the North Central States. USDA Forest Service, General Technical Report NC-39. North Central Forest Experiment Station, St. Paul, MN. 29 p.
U.S. Department of Agriculture, Forest Service. 1965. Silvics of forest trees of the United States. H. A. Fowells, comp. U.S. Department of Agriculture, Agriculture Handbook 271. Washington, DC. 762 p.
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