TY  - BOOK
AU  - Childs ,Lindsay
TI  - A concrete introduction to higher algebra / 
T2  - Undergraduate texts in mathematics
SN  - 9788181284136 (acidfree paper)
AV  - QA155 .C53 2000
PY  - 2000///
CY  - New York : 
PB  - Springer , 
KW  - Algebra
N1  - Includes bibliographical references (pages 509 - 512) and index
ER  -