TY  - DATA
AU  - M. Petrich
TI  - Categories of Algebraic Systems
T2  - Lecture Notes in Mathematics
SN  - 9783540379546
PY  - 1976///
CY  - Heidelberg
PB  - Springer Berlin
KW  - Mathematics and Statistics
UR  - https://doi.org/10.1007/BFb0094957
ER  -