Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 1-4

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 12-16

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 17-19

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 19-20

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 23

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 25-29

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 30

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 37-38

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 38-40

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 42

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 43-47

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 47-48

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 54-56

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 56-57

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 58-59

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 59-62

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 66-67

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 67

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 69

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 70

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 82-85

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Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 89-95

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 4-6

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 21-22

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 97-98

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 98-100

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 100-107

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Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 136-139

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 139-140

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Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 65-66

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Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 145-153

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 135-136

Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 6