U.N. Economic Commission for Europe <br/><br/>
Approaches and methods used in long-term social planning and policy making held at Arc-et-Senans from 3 - 10 May 

 - [s.l.]  [s.n.]  1972 
 - iv,274p.; 28cm. 
<br/><br/><label>Dewey Class. No.: </label>301.212  / UN