| http://www.w3.org/ns/prov#value | - rare, especially in comparison to the numerous long-term studies on populations in the northern United States and Canada (e.g., Carpenter, 1952; Gregory, 1977; Kephart and Arnold, 1982; Peterson, 1987; Jayne and Bennett, 1990; Whittier and Crews, 1990; Fitch, 1998).
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