Classification of the bird species of South America [as Pluvialis squatarola] Remsen, J. V., Jr., C. D. Cadena, A. Jaramillo, M. Nores, J. F. Pacheco, M. B. Robbins, T. S. Schulenberg, F. G. Stiles, D. F. Stotz, and K. J. Zimmer (2002-2008): Classification of the bird species of South America [http://www.museum.lsu.edu/~Remsen/SACCBa...], American Ornithologists' Union Data retrieved on: 2008/09/07
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