@book{74014,
	author = {Harrington, Constance A. and Karning, Jack J.},
	title = {Growth increase after moderate thinning in a 70 year-old mixed oak stand},
	publisher = {Harvard Black Rock Forest,},
	year = {1975},
	series = {Paper, 31},
	address = {Comwall, N. Y. :}
}