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Zur Fortpflanzungsgeschichte der gesammten Vgel Plate XLIX . ' otve ' ' ' ii ' f'r iy 'f Plate XLIX Illustration biodiversitylibrary org title Thienemann Friedrich August Ludwig Biodiversity Heritage Library Eggs Zur Fortpflanzungsgeschichte der gesammten Vgel Birds Pictorial works Reproduction Eggs Smithsonian