Author: Kelterborn, P., 1923.:
Title: Geologische und petrographische Untersuchungen im Malcantone (Tessin).
Description: Verh. Naturf. Ges. Basel, 34: pp. 128-232, 1 fold. col. map, 3 figs., 12 microphotos of rock samples on 3 plates, notes & refs. Offprint, orig. wrappers. Perforating stamp on front cover, very good otherwise.

Keywords: