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Gianfranco Cecchin , Gerry Lane , Wendel A. Ray ; foreward by Bradford P. Keeney
Karnac 1994 , c1992 Second Impression Systemic thinking and practice series / series editor David Campbell and Ros Draper
: pbk.
Available at 1 libraries
Gianfranco Cecchin, Gerry Lane, Wendel A. Ray ; foreword by Bradford P. Keeney
Karnac c1994