Revision of the Caradocian-Ashgillian cystoid fauna of Belgium with notes of isolated pelmatozoan stem fragments.
1951. Inst. Roy. Sci. Nat. Belg. Mém. 120; 47 pp. 6 plts. with descript. paes and transp. overlays h.t. Orig. wrps. margin of front cover a bit frayed, contents very good, lg4to.
Échinides de l'Éocène moyen de la région de Vic (Barcelone).
1970. Bull. Soc. Géol. France (7) XII ; pp. 894-912, 5 fig. 2 plts. h.t. with echinoids. Orig. wrps. with libr. stamp, stapled extract, very good, 4to.