TY  - BOOK
AU  - Tan, Kim H
TI  - Humic matter in soil and the environment : principles and controversies
SN  - 9780824742720
SN  - 200427010
U1  - 631.417 TAN 
PY  - 2003///
CY  - New York
PB  - Marcel Dekker
KW  - Humus - Environmental aspects
KW  - Soils - Humic acid content
N1  - Includes bibliographical references (p. 317-355) and index
ER  -