The Platysphinctes immigration event: Biostratigraphic and palaeobiogeographic implications for the Middle Oxfordian (Late Jurassic) seas of Central Europe (NW Germany and Poland).
2006. N. Jb. Geol. Paläont. Abh. 241; 14 fig./plts. pp. 155-202. Stapled extract.
An early Reticuloceras Zone fauna from the Hale Formation in northwestern Arkansas.
1968. US Geological Survey Professional Paper 613-A; 19 pp. 12 fig./phot. 2 plts. with fossils h.t. Orig. wrps. with libr. stamp in corner of front cover, contents very good, 4to.