TY  - BOOK
AU  - Hayes,Michael H.
TI  - Humic substances II: In search of structure 
SN  - 047192279X
PY  - 1989///
CY  - New York
PB  - John Wiley & Sons
KW  - Humic acid
KW  - Humus
N1  - Includes bibliographical references and index
ER  -