TY  - BOOK
AU  - Raana,Irfan Mahmud
TI  - Economic system under'Umar the great
PY  - 1977///
CY  - Lahore
PB  - Sh. Muhammad Ashraf
KW  - 'Umar ibn al-Khattab,
KW  - India
KW  - Economic conditions
ER  -