Estimation of oleoresin yield from Copaifera spp. in primary forest in meridional Amazon Authors: Roquette, José Guilherme, Drescher, Ronaldo, Brondani, Gilvano Ebling, Souza, Edila Cristina, Rondon-Neto, Rubens Marques, Ebert, Alexandre, Teixeira, Leandro Ribeiro