Die vögel der paläarktischen fauna : vol. I
The author aims to describe the geographical variety of birds and categorizes them systematically.
Hartert, Ernst
Die vögel der paläarktischen fauna : nachtrag I
The following pages are an addition to the works of that, the author wrote down previously. According to him It includes only the most important things like the new described forms and the geographical distribution.
Die vögel der paläarktischen fauna : vol. III
This publication is the final volume of the series "Vögel der paläarktischen Fauna". The author hopes that it gives the reader as much happiness as it did him.