About the Cornell Guide to Bird Sounds – Macaulay Library
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The Cornell Guide to Bird Sounds: United States and Canada – Macaulay Library
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John V. Moore, Niels Krabbe, Olaf Jahn, M. Lysinger, P. Coopmans, P. Mena V., A. Spencer, R. S. Ridgely, J. Nilsson, D. F. Lane, N. Athanas, L. Navarrete, John V. Moore, John