 | SNOWY OWLS | OWEN,RUTH | € 10.00 |
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| SNOWY OWLS WHO ARE THEY? | FORD,ANSLEY WATSON a.o. | € 15.00 |
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| SO CRANES MAY DANCE a rescue from the brink of extinction | KATZ,BARBARA | € 10.00 |
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| SOBRE MIGRACION Y AVIFAUNA EN MALLORCA, PRIMAVERA 1963 | BLONDEL,J. / VIELLIARD,J. | € 5.00 |
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| SOCIAAL GEDRAG BIJ DE DIEREN ( Aula pocket 378 ) | TINBERGEN,NICO | € 5.00 |
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| SOCIAL BEHAVIOUR IN BIRDS AND MAMMALS essays on the social ethology of animals and man | CROOK,J.H. a.o. | € 20.00 |
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| SOME ADAPTATIONS OF MARSH-NESTING BLACKBIRDS | ORIANS, G.H. | € 10.00 |
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| SOME BIRDS OF THE CAPE | WINTERBOTTOM,J.M. / UYS,C.J. | € 10.00 |
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| SOME COMMON BIRDS OF WEST AFRICA | FAIRBAIRN,W.A. | € 10.00 |
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| SOME DATA ON THE STATUS OF THE SPOONBILL, PLATALEA LEUCORODIA L., IN EUROPE, ESPECIALLY IN THE NETHERLANDS | BROUWER,G.A. | € 5.00 |
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| SOME DATA ON THE STATUS OF THE SPOONBILL, PLATALEA LEUCORODIA L., IN EUROPE, ESPECIALLY IN THE NETHERLANDS Zoologische mededelingen (Deel XXXIX) | BROUWER,G.A. | € 5.00 |
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| SOME EXPERIMENTS ON THE SENCE OF SMELL IN BIRDS studied by the method of conditioned reflexies | WALTER,W.G. | € 10.00 |
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| SOME EXPERIMENTS ON THE SENSE OF SMELL IN BIRDS STUDIED BY THE METHOD OF CONDITIONED REFLEXES thesis; Extrait des Archives Néerlandaises de Physiologie de l'homme et de animaux | WALTER,W.G. | € 12.00 |
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| SOME GAME BIRDS OF WEST AFRICA | FAIRBAIRN,WILLIAM ALEXANDER | € 10.00 |
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| SOME INDIAN FRIENDS AND ACQUAINTANCES | CINNINGHAM,D.D. | € 12.00 |
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| SOME OBSERVATIONS ON MAMMALS, BIRDS AND REPTILS IN THE LOWER VALLEY OF THE INDUS AND UPPER VALLEY OF THE BRAHMAPTURA | PILLERI,G. a.o. | € 10.00 |
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| SOME OBSERVATIONS ON THE AVIFAUNA OF WEST-SPITSBERGEN | DHONDT,A.A. a.o. | € 10.00 |
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| SOME PROTECTED BIRDS OF THE CAPE PROVINCE/SOMMIGE BESKERMDE VOËLS VAN KAAPLAND | HEY,D. | € 5.00 |
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| SOME REMARKABLE NEW BIRDS FROM DYAUL ISLAND. BISMARCK ARCHIPELAGO | SALOMONSEN,FINN | € 25.00 |
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| SONG AND GARDEN BIRDS OF NORTH AMERICA vol. 1 & 2 | WETMORE,ALEXANDER | € 15.00 |
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