Hemicidaroid echinoids from the Upper Cretaceous deposits in the Wadi Qena-area (estern desert, Egypt.
1989. Bulletin de l'Institut Royal des Sciences Naturelles de Belgique, Sciences de la Terre Vo. 59; pp. 127-135, 5-14, 1 fig. 1 plt. Orig. extract, stapled, very good, 4to.
Holectypoid echinoids from Cenomanian and Turonian strata in the Mons basin (Belgium) 2.Conulus.
1995. Bulletin de l'Institut Royal des Sciences Naturelles de Belgique, Sciences de la Terre 65; pp. 139-152, 2 plts. Orig. extract, stapled, very good, 4to.