Received for publication August 1, 1971.
Shade Tree Research Laboratory, Faculty of Forestry. Assistance by the Ontario Department of Lands and Forests, and the Toronto Department of Parks and Recreation, is gratefully acknowledged.
Jorgensen, Erik. 1967. Urban forestry: some problems and proposals. Fac. of Forestry, University of Toronto, Ontario. p. 1-10; and 1970. Urban forestry in Canada. Shade Tree Res. Lab., Fac. of Forestry, University of Toronto, Ontario, p. 1-16.
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