TY  - BOOK
AU  - Leff,Gordon
TI  - History and social theory / 
AV  - D 16 .L48 1969
U1  - 907.2 
PY  - 1969///]
CY  - London
PB  - Merlin Press
KW  - History
KW  - Methodology
KW  - Research
N1  - Includes bibliographical references
ER  -