Radde, "Aus den Daghestanischen Hochalpen," in Petermanns Mitteilungen, Erganzungsheft, No.
Radde, among which the most numerous are migratory birds and the birds of prey which pursue them.
The Siberian branch of the Russian Geographical Society was founded at the same time at Irkutsk, and afterwards became a permanent centre for the exploration of Siberia; while the opening of the Amur and Sakhalin attracted Maack, Schmidt, Glehn, Radde and Schrenck, whose works on the flora, fauna and inhabitants of Siberia have become widely known.
(1855-1856); Radde, Fauna and Flora des siidwestlichen Kaspigebietes (1886); J.
Radde, Reisen im mingrelischen Hochgebirge (Tiflis, 1866) and Vier Vortreige fiber den Kaukasus (Gotha, 1874); E.
Radde, Reisen an der persisch-russischen Grenze.
Radde and E.