Princípios e Perspectivas da Agroecologia

http://www.reformaagrariaemdados.org.br/sites/default/files/Princ%C3%ADpios%20e%20Perspectivas%20da%20Agroecologia%20-%20Francisco%20Roberto%20Caporal,%20Edisio%20Oliveira%20de%20Azevedo%20(Orgs)%20-%20Instituto%20Federal%20Paran%C3%A1%20Educa%C3%A7%C3%A3o%20%C3%A0%20Dist%C3%A2ncia,%202011.pdf