Allen, Charles Francis Hitchcock,  1895-, <br/><br/>
Six-membered heterocyclic nitrogen compounds with four condensed rings / 
by C. F. H. Allen, in collaboration with D. M. Burness [y otros] 
 - 345 páginas 
 - The chemistry of heterocyclic compounds ;  2 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Compuestos heterocíclicos<br/>Compuestos de nitrógeno
<br/><br/><label>LC Class. No.: </label>QD401  / A42