Helmersen,G.V.
Geological and Physico-Geographical Observations in the Olonez Mountain District. (Submitted to the Academy on January 21, 1875). Atlas only. St.Petersburg 1882. cl.fol. with 14 (1 of them color) illustrations on 6 lithogr. plates. 3 pp. OU. (= Beiträge zur Kenntnisniss des Russischen Reiches und der angrenzenden Länder Asiens, 2. Folge, Atlas zum 5. Bd.). - Without the text volume. All plates and folios stamped and stained on verso, 1 plate with repaired corner tears. Corner tears. - Rare.