ESCHER, B.G. - Vesuvius, the Tengger Mountains and the problem of Calderas.

1927. Reprint: Leidsche Geol. Meded. II; pp. 51-88, 10 fig. 12 fold-out photoplts. 6 fold-out plts. (1 col.) with maps & figs. Orig. wrps. with small libr. ticket, contents very good.