TY  - BOOK
AU  - Fogel,Robert William
AU  - Eengerman,Stanley L.
TI  - Time on the cross: the economics at American negro slarery 
SN  - 0393306208 :
U1  - 331.117340973 
PY  - 1989///
CY  - London
PB  - W. W. Norton
KW  - Slavery
KW  - United States
KW  - Economic aspects
N1  - Includes bibliographical references and index
ER  -