Spatial diffusion  theory and practice /  [motion picture] : 
made by BBC-TV ; introduced by John Blunder. 
 - Milton Keynes :  Open University,  1972. 
 - 1 film reel (25 min.) :  sd., col. ;  16 mm. 
 - Open University/New trends in geography  D281, film no.9. .
<br/><br/> An area in the vicinity of the irrigation dam in Zig valley ( Southern Morroco ) has been used for the diffusion of innovations and agriculture innovations and its acceptance by local farmers.  note: 4p.  Converted into VHS 1/2 in. and U-matic 3/4 in. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Diffusion of innovations.<br/>Communication of technical information.<br/>Agricultural--Morocco.