TY - BOOK AU - Ghabbour,Elham A. AU - Davies,Geoffrey ED - International Humic Substances Society ED - Humic Substances Seminar TI - Humic substances: nature's most versatile materials SN - 0591690153 PY - 2004/// CY - New York PB - Taylor and Francis KW - Humus KW - Congresses KW - Soils KW - Humic acid content N1 - 'Selected papers presented in 2002 at IHSS 11 and Humic Substances Seminar VI at Northeastern University'--P. 4 of cover; Includes bibliographical references and index ER -