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Zur Fortpflanzungsgeschichte der gesammten Vgel Plate XXXVIII . fr ' frY ry iv yf 't ry Plate XXXVIII Illustration biodiversitylibrary org title Thienemann Friedrich August Ludwig Biodiversity Heritage Library Eggs Zur Fortpflanzungsgeschichte der gesammten Vgel Birds Pictorial works Reproduction Eggs Smithsonian Institution