Dickson, Leonard E. <br/><br/>
Algebraic theories 

 - New York  Dover Publications       1959 
 - ix, 276 p.  Includes bibliographical reference and index 
<br/><br/> Algebraic theories formerly known as "Modern algebraic theories," refers to a field within mathematics that studies algebraic structures and their properties using equations and terms with free variables. It's closely related to the concept of algebraic structures, and is considered a stronger condition than saying a theory is elementary.  
<br/><br/><label>Source: </label> Reference 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebra<br/>Mathematics