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Are Rings of Holes in Tree Bark Made by Downy Woodpeckers?
Charles W. Townsend

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Observations on the Head Markings of the Golden-crowned Sparrow
Joseph Mailliard

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Nesting of the Hammond Flycatcher in Eldorado County, California
Rose Carolyn Ray

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Technique of Raptor Food Habits Study
Paul L. Errington

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The Two Check-lists of 1931-a Critical Commentary
Joseph Grinnell

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The Summer Distribution of Certain Birds in Central and Northern Arizona
Alden H. Miller

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Editorial Notes and News
J. Grinnell

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Current Discussion: Game and Wild Life Conservation
Alde Leopold

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Minutes of Cooper Club Meetings
John McB. Robertson and Hilda W. Grinnell

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Report on Conservation
John M. Linsdale

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Back Matter (PDF)
The Condor

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Front Matter (PDF)
The Condor

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A Station of Frequent Observation of the Cowbird in the San Francisco Bay Region
Gayle Pickwell

The Black Swift in Glacier National Park
Winton Weydemeyer

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Note on the Food of an Arizona Spotted Owl
Laurence M. Huey

Bird Notes from the Upper Rio Grande Valley
James Stevenson

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The Wood Ducks in Napa County, California
E. L. Rickford

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Review: the Prairie Horned Lark by Gayle B Pickwell
T. T. McCabe

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Review: the Riddle of Migration by William Rowan
Alden H. Miller