Published in Journal für Ornithologie, in 1904, in volume 52, pages 50-69

Published in Journal für Ornithologie, in 1904, in volume 52, pages 70-80

Published in Journal für Ornithologie, in 1904, in volume 52, pages 80-121

Published in Journal für Ornithologie, in 1904, in volume 52, pages 122-125

Published in Journal für Ornithologie, in 1904, in volume 52, pages 132-135

Published in Journal für Ornithologie, in 1904, in volume 52, pages 135-136

Published in Journal für Ornithologie, in 1904, in volume 52, pages 137-244

Published in Journal für Ornithologie, in 1904, in volume 52, pages 296-301

Published in Journal für Ornithologie, in 1904, in volume 52, pages 302-306

Published in Journal für Ornithologie, in 1904, in volume 52, pages 306-308

Published in Journal für Ornithologie, in 1904, in volume 52, pages 308-313

Published in Journal für Ornithologie, in 1904, in volume 52, pages 313-314

Published in Journal für Ornithologie, in 1904, in volume 52, pages 315-316

Published in Journal für Ornithologie, in 1904, in volume 52, pages 316-319

Published in Journal für Ornithologie, in 1904, in volume 52, pages 321-405

Published in Journal für Ornithologie, in 1904, in volume 52, pages 405-410

Published in Journal für Ornithologie, in 1904, in volume 52, pages 431-443

Published in Journal für Ornithologie, in 1904, in volume 52, pages 455-456

Published in Journal für Ornithologie, in 1904, in volume 52, pages 457-506

Published in Journal für Ornithologie, in 1904, in volume 52, pages 506-547

Published in Journal für Ornithologie, in 1904, in volume 52, pages 555-563

Published in Journal für Ornithologie, in 1904, in volume 52, pages 563-564

Published in Journal für Ornithologie, in 1904, in volume 52, pages 565-566

Published in Journal für Ornithologie, in 1904, in volume 52, pages 566-570

Published in Journal für Ornithologie, in 1904, in volume 52, pages 570-572