Published in Journal für Ornithologie, in 1901, in volume 49, pages 1-5

Published in Journal für Ornithologie, in 1901, in volume 49, pages 6-46

Published in Journal für Ornithologie, in 1901, in volume 49, pages 46-57

Published in Journal für Ornithologie, in 1901, in volume 49, pages 57-60

Published in Journal für Ornithologie, in 1901, in volume 49, pages 73-80

Published in Journal für Ornithologie, in 1901, in volume 49, pages 81-99

Published in Journal für Ornithologie, in 1901, in volume 49, pages 99-102

Published in Journal für Ornithologie, in 1901, in volume 49, pages 105-109

Published in Journal für Ornithologie, in 1901, in volume 49, pages 109-114

Published in Journal für Ornithologie, in 1901, in volume 49, pages 115

Published in Journal für Ornithologie, in 1901, in volume 49, pages 116-156

Published in Journal für Ornithologie, in 1901, in volume 49, pages 165-168

Published in Journal für Ornithologie, in 1901, in volume 49, pages 169-190

Published in Journal für Ornithologie, in 1901, in volume 49, pages 190-210

Published in Journal für Ornithologie, in 1901, in volume 49, pages 210-220

Published in Journal für Ornithologie, in 1901, in volume 49, pages 220-229

Published in Journal für Ornithologie, in 1901, in volume 49, pages 230-245

Published in Journal für Ornithologie, in 1901, in volume 49, pages 246-264

Published in Journal für Ornithologie, in 1901, in volume 49, pages 265-269

Published in Journal für Ornithologie, in 1901, in volume 49, pages 270-273

Published in Journal für Ornithologie, in 1901, in volume 49, pages 274-275

Published in Journal für Ornithologie, in 1901, in volume 49, pages 275-276

Published in Journal für Ornithologie, in 1901, in volume 49, pages 276-279

Published in Journal für Ornithologie, in 1901, in volume 49, pages 279-280

Published in Journal für Ornithologie, in 1901, in volume 49, pages 283-285

Published in Journal für Ornithologie, in 1901, in volume 49, pages 286-288

Published in Journal für Ornithologie, in 1901, in volume 49, pages 289-303

Published in Journal für Ornithologie, in 1901, in volume 49, pages 304-322

Published in Journal für Ornithologie, in 1901, in volume 49, pages 322-334

Published in Journal für Ornithologie, in 1901, in volume 49, pages 337-359

Published in Journal für Ornithologie, in 1901, in volume 49, pages 360-361

Published in Journal für Ornithologie, in 1901, in volume 49, pages 361-381

Published in Journal für Ornithologie, in 1901, in volume 49, pages 383-384

Published in Journal für Ornithologie, in 1901, in volume 49, pages 385-393

Published in Journal für Ornithologie, in 1901, in volume 49, pages 457-461

Published in Journal für Ornithologie, in 1901, in volume 49, pages 461-467

Published in Journal für Ornithologie, in 1901, in volume 49, pages 467-468