Rudoffer, Stephen <br/><br/>
Mathematics observed 

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 - London  Hans Freudenthal  1967 
 - 256 p.   
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<br/><br/><label>Subjects--Index Terms: </label>Mathematics  Number theory  Set theory  Group theory  Mathematical sciences  Pure mathematics  Modern mathematics  Arithmetic & algebra 
<br/><br/><label>Dewey Class. No.: </label>51