TY  - BOOK
AU  - Estall,Robert C.
TI  - A modern geography of the United States: aspects of life and economy 
SN  - 0140213651
PY  - 1972///
CY  - Harmondsworth
PB  - Penguin
KW  - United States
KW  - Economic conditions
KW  - 1971-1981
N1  - Includes bibliographical references (p. 388-393) and index
ER  -