by J. H. Bowen and E. F. O. Masters. by J. E. Gowan and T. S. Wheeler. by J. H. Cairns and P. T. Gilbert. by W. R. Schoeller, A. R. Powell Edited by D. E. Thomas [and] E. T. Hayes. by J. H. Simpson and R. S. Richards. by J. M. Boeynaems and J. E. Dumont. by J. B. Poole and D. Doyle. by J. M. Camp and C. B. Francis. by J. V. Dacie and S. M. Lewis.