Verlag: (Emil Ebering), 1910., Berlin:, 1910
Anbieter: Jeff Weber Rare Books, Neuchatel, NEUCH, Schweiz
4to. 54 pp. Tables. Original printed wrappers; spine ends worn, ms. on cover. Rubber stamp of Lick Observatory on title. Very good. Struve was the son of astronomer Karl Hermann Struve, and continued his father's work on planetary satellites. This is his dissertation.