TY  - BOOK
AU  - Tritton,A.S.
TI  - The caliphs and their non-muslim subjects: a critical study of the covenant of'Umar 
SN  - 0714619965
PY  - 1970///
CY  - London
PB  - Frank Cass
KW  - Caliphate
KW  - Islamic Empire
KW  - History
N1  - Includes index
ER  -