TY - BOOK AU - Closs,Gerry AU - Downes,Barbara J. AU - Boulton,Andrew J. TI - Freshwater ecology: a scientific introduction SN - 063205266X (pbk. : alk. paper) U1 - 577.6 23 PY - 2004/// CY - Malden, MA. PB - Blackwell Pub. Co. KW - Freshwater ecology N1 - Includes index ER -