Heligoland as an ornithological observatory
Subtitle: the result of fifty years' experience
Contributors: Rosenstock, Rudolph.
Publisher: D. Douglas
Published: 1895
Place of publication: Edinburgh
Language: eng
Number of pages: 599
Subjects: Birds -- Migration.; Natural history -- Germany -- Helgoland.; Birds -- Germany -- Helgoland.
Table of contents: value: Migration of birds.; value: Changes in the colour of the plumage of birds without moulting.; value: Account of the birds observed in Heligoland.