Ross Alf <br/><br/>
Directives and norms 

 -  1967 
 - International library of philosophy and scientific method ed by Ted Honderich .
<br/><br/><label>Standard No.: </label>1,678 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>LOGIC
<br/><br/><label>Dewey Class. No.: </label>R1, K73-;1