Geological Society, London, Special Publications
Volume 20, 1986
Palaeoecology and Biostratigraphy of Graptolites
Edited by:
C.P. Hughes, Department of Earth Sciences, University of Cambridge, Cambridge
R.B. Rickards, Department of Earth Sciences, University of Cambridge, Cambridge and
A.J. Chapman, Division of Geology, Derby Lonsdate College of Higher Education, Derby