KLAASSEN M (1995) Book reviews: Piersma, T., Close to the edge: energetic bottlenecks and the evolution of migratory pathways in Knots, 1994. LIMOSA 68 (3): 130-131.

PIERSMA T. 1994. Close to the edge: energetic bottlenecks and the evolution of migratory pathways in Knots. Het Open Boek, Den Burg. 366 p. ISBN 90.70202.20.4.

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