TY  - BOOK
AU  - Huntington ,Ellsworth
AU  - William,Frank Ernest
AU  - Van  Valkenburg,Samuel
AU  - Visher,Stephen Sargent
TI  - Principles of economic geography/ 
U1  - 91:33 
PY  - 1940///, repr.1970
CY  - NewYork : 
PB  - J. Wiley & sons,inc. , 
KW  - Geography, Economic
N1  -  Includes bibliographical references (p.683-687)
ER  -