edited by R.I.G. Allen & W.F. Gossling ; with papers by R.I.G. Allen & W.F. Gossling ; with papers by R.I.G. Allen ... [et al.] ; foreword by I.G. StewartInput-Output Publishing Co.1975
edited by W.F. Gossling ; with contributions from T.E. Heywood ... [et al.] ; and a selected bibliography by R.I.G. Allen ; foreword by Richard StoneInput-Output Publishing Co.1975