The heterogeneity of the form genus Mariopteris Zeiller. A comparative morphological study with special reference to the frond composition of West-European species.
Diss. Univ. Utrecht. 172 pp. 21 fig. Orig. wrps. very good. !! Lacks separate plate section !!
Mesozoic sporae dispersae from Zaïre : I. Haute-Lueki Series. /&/ II. The Loia and Bokungu Groups in the Samba borehole. /&/ III. Some miospores from the Stanleyville Group.
1976, Musée Royal de l'Afrique Centrale, Annales Scieces Géologique 78&80; VIII+40+60 pp. 6+8 plts. Orig. wrps. libr. stamp on front cover.
Palaeozoic sporae dispersae from Zaïre (Congo) : XI. Assises glaciaires et périglaciaires from the Lukuga valley. /&/ XII, Assise à couches de houille from Greiner-ville region.
1976. Musée Royal de l'Afrique Centrale, Annales Scieces Géologique 77; X + 133 pp. 31 fig. 9 tab. 13 plts. Orig. wrps. libr. stamp on front cover.