Geraldine, D. G.; Nunes, C. L. de M.; Almeida, R. de A. GROSS MARGIN: ANIMAL TRACTION NO-TILLAGE - “SERRA ABAIXO” SMALL FARMERS ASSOCIATION (APASA), 1996. Pesq. Agropec. Trop. 2007, 28 (2), 1-12. https://doi.org/10.5216/pat.v28i2.2990.