TY  - BOOK
AU  - Engerman S L
AU  -  Gallman R E
TI  - Cambridge economic history of the United States
SN  - 0521394432
U1  - X.73.N9, N6.1/RR 
PY  - 1996///
CY  - Cambridge
PB  - Cambridge University Press        
KW  -  United States
KW  - Economic Conditions
ER  -