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Earlier Established Forms
found: Mumford, R.E. The birds of Indiana, 1984: CIP t.p. (William Zimmerman)
found: LC data base, 12/21/83 (hdg.: Zimmerman, William H.; usage: William Zimmerman)
found: Monroe, B.L. The birds of Kentucky, 1994: CIP t.p. (William Zimmerman) data sht. (b. 10-01-37)