Gupta R R <br/><br/>
Heterocyclic chemistry -1 principles.three and four members heterocyclies. 

 -  Springer  2005 
 - 422p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CHEMISTRY
<br/><br/><label>Dewey Class. No.: </label>543.7