Author(s):
Ferreira, Cláudia ; Tracana, Rosa Branca
; Ferreira, Maria Eduarda
; Carvalho, Graça Simões de
Date: 2007
Persistent ID: http://hdl.handle.net/1822/6700
Origin: RepositóriUM - Universidade do Minho
Subject(s): Pollution; Textbooks