TY  - BOOK
AU  - Johnston, Bernard L.
AU  - Richman, Fred,
TI  - Numbers and symmetry: an introduction to algebra 
SN  - 084930301X (acidfree paper)
PY  - 1997///
CY  - Boca Raton
PB  - CRC Press
KW  - Algebra
N1  - Includes bibliographical references and index
ER  -