Simis, Aron. <br/><br/>
When are projective modules free?/ 
Aron Simis. 
 - Kingston, Ont.:  Queen's University,  1969. 
 - iii l., 254 p.:  28 cm. 
 - Queen's papers in pure and applied mathematics;  no. 21 .
<br/><br/>Bibliography: p. 249-254. 
<br/><br/><label>LCCN: </label>70557986 
<br/><br/><label>Nat. Bib. No.: </label>C*** 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Projective modules (Algebra)<br/>Rings (Algebra)
<br/><br/><label>Dewey Class. No.: </label>512/.522