Edited by:
M. R. Smith, The Institute of Quarrying, Nottingham and
L. Collis, Sandberg, London (retired)
P. G. Fookes, Consultant, Winchester
J. Lay, RMC Aggregates (UK) Limited, Bromsgrove
I. Sims, STATS Limited, St. Albans
M. R. Smith, The Institute of Quarrying, Nottingham and
G. West, TRL, Crowthorne (retired)