TY  - BOOK
AU  - Petrich, Mario
TI  - LECTURES IN SEMIGROUPS
U1  - 512.2 
PY  - 1977///
CY  - London
PB  - John Wiley
KW  - Semigroups
KW  - Matrices
KW  - Decomposition (Mathematics)
N1  - Bibliography : P. 153-164; Most Of The Present Material Was The Content Of A Course Given... At The Pennsylvania State University In 1972/73
ER  -