TY  - BOOK
AU  - Childs Lindsag
TI  - Concrete Introductionn to higher algebra
T2  - Undergraduate texts in mathematics
U1  - B25, L9 
PY  - 1979///
CY  - New York    
PB  -  Springer Verlag       
KW  -  Higher algebra
KW  - Mathematics
ER  -