HAGERSTRAND, Torsten Pred, Allan. <br/><br/>
Innovation diffusion as a spatial progress / 
[by] Torsten Hagerstrand; translated by Allan Pred 
 - Chicago  The University of Chicago press  1953 
 - xvi, 334 p. 
<br/><br/> Includes index. 
<br/><br/><label>Dewey Class. No.: </label>910.14  / HAG