Two forms of evaluation : paper written for the 1st conference of the European chapter of the International association for impact assessment on "Impact forecasting, methods, results, experiences" held at Leiden and Delft, The Netherlands, on June 16-17, 1988

Two forms of evaluation : paper written for the 1st conference of the European chapter of the International association for impact assessment on "Impact forecasting, methods, results, experiences" held at Leiden and Delft, The Netherlands, on June 16-17, 1988