00393nam a22001337a 450000500170000000800410001702000080005804100080006608200170007410000210009124500880011226000480020030000110024820260703155921.0260522b        |||||||| |||| 00| 0 eng d  a000  aeng  a512.8bLAA/B  aLaatsch, Richard  aBasic Algebraic Systemb: An Introduction to Abstract Algebrac/ by Richard Laatsch  aNew York:bMcgraw-Hill Book Company,c1968.  a224p.;