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Evaluation du vendeur
Edité par The British Trust for Ornithology, 1969
Vendeur : Shore Books, London, Royaume-Uni
Magazine / Périodique
Soft cover. Etat : Very Good. 64 pages. David Lack "The numbers of bird species on islands" / H B Ginn "The use of annual ringing and nest record card totals, as indications of population levels" / W R P Bourne "Seabird Group, Interim Report 1968-69" (SL#83).