Scafer, Wilhelm Ecology and palaeoecology of marine environments / edited by G.Y. Craig ; translated by Irmgard Oertel. - Chicago : University of Chicago Press, c1972. - xii, 568 p. : ill. ; 23 cm. Includes index. Bibliography: p. 508 - 543. ISBN: 0226735818 Subjects--Topical Terms: Paleontology.Marine biology--North Sea.