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B.S. 22207. Old channel of Río Negro. General Roca, Río Negro, Argentina. December 3, 1920.

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B.S. 22209. Willows growing on gravel bars along Río Negro. General Roca, Río Negro, Argentina. December 3, 1920.

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B.S. 22210. Small grebe, [[underlined]] Colymbus chilensis. [[/underlined]] General Roca, Río Negro, Argentina. December 3, 1920.