Armarego, W.L.F <br/><br/>
Stereochemistry of heterocyclic compounds  W.L.F. Armarego. 

 - New York  John Wiley and Sons  1977 
 - xvii, 494p.: ill. 25 cm. 
<br/><br/> pt.2 Oxygen Sulfur Mixed N, O, and S and Phosphorus heterocycles. Gallagher, M. J. 
<br/><br/><label>Dewey Class. No.: </label>547.59  / G26G