1923. Mus. Nac. Cie. Natur. Com. Invest. Paleont. y Prehist. Mem. No. 32; 57 pp. 17 fig./phot. orig. wrps. ends of spine a bit worn, contents very good.
1891. Mém. cour. et autres Mém. de l'Acad. Roy. des Sciences, des Lettres et des Beaux-Arts de Belgique Coll. in-8o, T. XLV; 127 pp. 1 plt. with inscription h.t. 1 plt. h.t. with col. map folding out. Plain modern wrps. contents very good, uncut, unread.