Humic substances in the global environmental and implications on human health :  proceedings of the 6th International Meeting of the international humic substances society, Monopoli, Italy, 20-25 September, 1992 / 
edited by N. Senesi, T. M. Miano. 
 - Amsterdam :  Elsevier,  1994. 
 - 1368 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0444895930  RM1659.24 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Humic acid--Derivatives--Congresses.<br/>Humic acid--Derivatives--Analaysis--Congresses.<br/>Humic acid--Derivatives--Environmental aspects--Congresses.