Chemistry and biology of pteridines:   

 - Berlin; New York   W. de Gruyter,  1983 
 - xxxiv, 1070 p. : 
<br/><br/><label>ISBN: </label>3110085607 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Folic acid; Pteridines; Folic acid; Pteridines
<br/><br/><label>LC Class. No.: </label>QP801.P69  / C43-1983