Planktonic Foraminifera stratigraphy of the Pénzeskút Marl Formation. [Middle Cretaceous].
1989, Ann. Inst. Geol. Publ. Hung. LXIII-5; 127 pp. in Hungarian, with English summary (pp. 81-103) and captions, 23 fig. 8 plts. Orig. wrps. small libr. stamp on title page only.