@book{12639,
	author = {Roach, Benjamin A. and Gingrich, Samuel F.,},
	title = {Even-aged silviculture for upland central hardwoods,},
	publisher = {U.S. Forest Service; for sale by the Supt. of Docs., U.S. Govt. Print. Off.,},
	year = {1968.},
	series = {United States. Dept. of Agriculture. Agriculture handbook ;},
	address = {Washington,}
}