TY  - BOOK
AU  - XU,JINZHONG
TI  - FLAT COVERS OF MODULES / 
U1  - 512.4 
PY  - 1996///
CY  - [S.N] : 
PB  - SPRINGER - VERLAG ، 
KW  - MATHEMATICS
KW  - ALGEBRA
KW  - MODULES
KW  - RINGS
KW  - INJECTIVE MODULES
ER  -