Geraldine, D. G., Nunes, C. L. de M., & Almeida, R. de A. (2007). GROSS MARGIN: ANIMAL TRACTION NO-TILLAGE - “SERRA ABAIXO” SMALL FARMERS ASSOCIATION (APASA), 1996. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], 28(2), 1-12. https://doi.org/10.5216/pat.v28i2.2990