Published in Journal für Ornithologie, in 1919, in volume 67, pages 1-73

Published in Journal für Ornithologie, in 1919, in volume 67, pages 106-109

Published in Journal für Ornithologie, in 1919, in volume 67, pages 109-115

Published in Journal für Ornithologie, in 1919, in volume 67, pages 116-118

Published in Journal für Ornithologie, in 1919, in volume 67, pages 118-123

Published in Journal für Ornithologie, in 1919, in volume 67, pages 123-126

Published in Journal für Ornithologie, in 1919, in volume 67, pages 127

Published in Journal für Ornithologie, in 1919, in volume 67, pages 129-158