Registry of toxic effects of chemicals substances: user's guide  (Book) 

 - Washington D.C.  National Institute for Occupational Safety and Health  1987 
 - 458 p.  29 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Toxicology--Periodicals
<br/><br/><label>Universal Decimal Class. No.: </label>540. 01 : 541. 69 (026) REG  / 13606