Notes on the hematology of free-living Phrynops geoffroanus (Testudines: Chelidae) in polluted rivers of Southeastern Brazil - Ferronato, Bruno de Oliveira; Genoy-Puerto, Alexander; Piña, Carlos Ignácio; Souza, Franco Leandro de; Verdade, Luciano Martins; Matushima, Eliana Reiko (Zoologia: An International Journal for Zoology, 2009)