Published in Journal für Ornithologie, in 1922, in volume 70, pages 49

Published in Journal für Ornithologie, in 1922, in volume 70, pages 324-361

Published in Journal für Ornithologie, in 1922, in volume 70, pages 361-385

Published in Journal für Ornithologie, in 1922, in volume 70, pages 385-397

Published in Journal für Ornithologie, in 1922, in volume 70, pages 491

Published in Journal für Ornithologie, in 1922, in volume 70, issue 1, pages 5-6

Published in Journal für Ornithologie, in 1922, in volume 70, issue 1, pages 6-14

Published in Journal für Ornithologie, in 1922, in volume 70, issue 1, pages 56-60

Published in Journal für Ornithologie, in 1922, in volume 70, issue 1, pages 69-88

Published in Journal für Ornithologie, in 1922, in volume 70, issue 1, pages 129-132

Published in Journal für Ornithologie, in 1922, in volume 70, issue 1, pages 132-135

Published in Journal für Ornithologie, in 1922, in volume 70, issue 1, pages 135-136

Published in Journal für Ornithologie, in 1922, in volume 70, issue 2-3, pages 275-285

Published in Journal für Ornithologie, in 1922, in volume 70, issue 4, pages 419-423

Published in Journal für Ornithologie, in 1922, in volume 70, issue 4, pages 430-482

Published in Journal für Ornithologie, in 1922, in volume 70, issue 4, pages 482-487

Published in Journal für Ornithologie, in 1922, in volume 70, issue 4, pages 487-488

Published in Journal für Ornithologie, in 1922, in volume 70, issue 4, pages 492-506

Published in Journal für Ornithologie, in 1922, in volume 70, issue 4, pages 506-517

Published in Journal für Ornithologie, in 1922, in volume 70, issue 4, pages 517-518