Author: Bless, M.J.M., (et al.), 1981.:
Title: Preliminary report on Lower Tertiary-Upper Cretaceous and Dinantian-Famennian rocks in the boreholes Heugem 1/1a and Kastanjelaan 2 (Maastricht, the Netherlands).
Description: Meded. Rijks Geol. Dienst, 35-15: pp. 333-415, several photos (parlty of fossils) on 22 plates, 8 figs., 29 tabs., 3 fold. .lithodtratigr. sections and 1 fold. cross-section loosely inserted. 4to. Offprint, orig. wrappers. Fine.

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