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U.S. Dept. of Interior, 1950. Status: Out of print Binding: Paperback. Condition: Very Good. Pages: 102 1950. Paperback in very good condition. Descriptions of the orgins, how, where, routes and problems of migration.
U.S. Dept. of Interior, 1998. Status: Out of print Edition: 3rd edition. Binding: Paperback. Condition: As new. Pages: 113 As new paperback of Circular 16 from the U.S. Fish & Wildlife Service. This edition revised by John L. Zimmerman. Migration maps with breeding and wintering ranges in color. Color illustrations.....