Perspectives of planning :  proceedings of the OECD working symposium on long-range forecasting and planning Bellagio, Italy 27th October-2nd November 1968 / 
Erich Jantsch. 
 - Paris :  Organisation For Economic Co-Operation and Development,  1969. 
 - 527 pages ;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technological forecasting--Congresses.