Laatsch, Richard <br/><br/>
Basic Algebraic System  : An Introduction to Abstract Algebra 
/ by Richard Laatsch 
 - New York:  Mcgraw-Hill Book Company,  1968. 
 - 224p.; 
<br/><br/><label>ISBN: </label>000 
<br/><br/><label>Dewey Class. No.: </label>512.8  / LAA/B