edited by R. Kalvoda and Roger Parsons. edited by Robert A. Parsons. edited by Rom Harre and Roger Lamb. edited by Roy M. Harrison and Roger Perry. edited by R. Douglas Wilkerson. edited by Ian W. Knowles and Roger T. Lewis. edited by R.K. Robinson. edited by Georgia A. Persons. edited by Fritz Wagner and Roger Caves. edited by Roger Perry and Robert J. Young.