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Probable Causes of Bird Scarcity in Parts of the Sierras (an Arraignment of the Chipmunk)
John J. Williams

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Nesting of the Rivoli Hummingbird in Southern Arizona
O. W. Howard

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An Outing into the Pyramid Peak Region of California
C. Barlow

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The American Titlark in Spring Plumage in Los Angeles, Co, California
H. S. Swarth

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The Evening Grosbeak as a Pet
Miss Estelle Burton

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Notes on Some Birds of Cape Nome, Alaska
Joseph Grinnell

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The Nesting of Clarke's Nutcracker
W. H. Parker

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Editorial Notes
C. Barlow

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Facts and the Use We Make of Them
Roth Reynolds

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Book Reviews
C. Barlow

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Official Minutes of Southern Division
Howard Robertson