TY - BOOK AU - Dobson,Mike AU - Chris,Frid TI - Ecology of aquatic systems SN - 0582298040 AV - QK358 .D6 1998 PY - 1998/// CY - New York PB - Longman KW - EcologĂ­a N1 - BibliografĂ­a : p. 189-203 ER -