Walmsley, D. J. <br/><br/>
People and environment :  behavioural approaches in human geography / 
D.J. Walmlsey and G.J. Lewis. 
 - 2nd ed. 
 - Essex, England :  New York :  Longman Scientific & Technical ;  John Wiley,  1993. 
 - xii, 290 p. :  ill., maps ;  25 cm.