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Coen-Aubert, M. & Wrzolek, T. 1991.
Redescription of the rugose coral Macqeea (Rozkowskaella) sandaliformis (Rozkowska, 1980) from the Upper Frasnian of het Holy Cross Mountains (Poland).
 Bull. 61: 5-19
Federowski, J. 1991.
Dividocorallia, a new subclass of Palaeozoic Anthozoa.
Bull. 61: 21-105
Godefroid, J. 1991.
Solitudinella hollardi n. gen., n. sp. (Brachiopoda, Lissatrypidae) dans le Praguien du Maroc pré-saharien.
Bull. 61: 107-121
Sartenaer, P. & Xu H-K. 1991.
Two new Rhynchonellid (Brachiopod) species from the Frasnian Shetienchiao Formation of central Hunan, China.
Bull. 61: 123-133
Dean, W.T. 1991.
Ordovician trilobites from the inlier at le Petit Fond d'Oxhe, Belgium.
Bull. 61: 135-155
Casier, J.G. & Préat A. 1991.
Révision de la séquence du Paléolithique Supérieur de Willendorf (Autriche).
Bull. 61: 157-177
Kenrick, P. & Fairon-Demaret M. 1991.
Archaeoptris roemeriana (Göppert) senus Stockmans, 1948 from the Upper Famennian of Belgium: anatomy and leaf polymorphism.
Bull. 61: 179-195
Jagt, J. 1991.
A new ophiuroid from the Maastrichtian type area (Late Cretaceous, SE Netherlands,NE Belgium.
Bull. 61: 197-209
Van Neere, W. & Germonpre M. 1991.
Le gisement pléistocène à grands mammifères de Rotselaar (Brabant; Belgique).
Bull. 61: 211-226
Wartel, S. & Sethi, P.S. 1991.
Effect of Overburden Pressure on Clay Fabric.
Bull. 61: 227-230
Deliens, M. 1991.
Titanian Aeschynite-(Y) from Trimouns (French Pyrenees); review of the minerals of the aeschynite group.
Bull. 61: 231-236
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