Stehn, E., 1923.:MareMagnum
2 résultats
pp. 52-158, 8 pls. of ammonites, 19 figs., refs. Orig. wrs. Spine mended. - Deals only with the ammonite fauna.
8vo. Pp. 42, 27 large high-quality microphotos on 11 pls. on special glossy paper, tabs., refs. Orig. wrs.