TY - BOOK AU - Gjessing,Egil T. TI - Physical and chemical characteristics of aquatic humus SN - 0250401150 U1 - 631.417 PY - 1976/// CY - Ann Arbor, Mich. PB - Ann Arbor Science Publishers KW - Humus KW - Soil moisture KW - Water chemistry N1 - Title on spine: Characteristics of aquatic humus; Includes index ER -