Spath, Leonard Frank, 1925, On Upper Albian Ammonoidea from Portuguese East Africa, with an appendix on Upper Cretaceous ammonites from Maputoland

Spath, Leonard Frank, 1925, On Upper Albian Ammonoidea from Portuguese East Africa, with an appendix on Upper Cretaceous ammonites from Maputoland, Annals of the Transvaal Museum 11, No. 3, pp. 179-200