Esiste una periodicità nei fenomeni sismici?

Modena, Antica Tipografia Soliani, 1902 245x167 mm. 9 pp. Original printed wrappers, a bit soiling. A good copy, lacking the lower inner corner. Slightly frayed the upper blank margin, and the right corner. On front cover small paper label with the inked number ‘43a’; some blue-pencilled numbers. Offprint from: Bollettino della Società Sismologica Italiana, viii (1902).
€ 70