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The Calendar of Wideawake Fair
James P. Chapin

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Territory, Nest Building, and Pair Formation in the Cliff Swallow
John T. Emlen Jr.

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A Nesting Study of the Black Tern in Michigan
Nicholas L. Cuthbert

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The Structure of the Cloacal Protuberance of the Vesper Sparrow (pooecetes Gramineus) and Certain Other Passerine Birds
W. Ray Salt

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The Seventy-first Stated Meeting of the American Ornithologists' Union
Albert Wolfson

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Officers, Trustees, and Committees of the American Ornithologists' Union
The Auk

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Recent Literature
The Auk

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Notes and News
The Auk

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Special Report and Proposals Regarding Conservation Activities of the American Ornithologists' Union
The Auk

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Obituaries
The Auk

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The Wintering Meadowlarks of Dane County, Wisconsin
A. W. Schorger

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The Ipswich Sparrow (passerculus Princeps) on Chesapeake Bay, Virginia
Frederic R. Scott

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A Juba River Race of Klaas's Cuckoo
James P. Chapin

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House Martin and Swift from Ascension Island
James P. Chapin

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Breeding Dates for Barn Owls in Southern California
Wilson C. Hanna

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Mute Swan (cygnus Olor) Observed Diving
A. E. Staebler

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Front Matter
The Auk

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Back Matter
The Auk