Rigitano, R.L. de O. et al. 1982. Ethion and fenitrothion residues in ’Hamlin’ orange peels and pulp determined by gas chromatography. Anais da Sociedade Entomológica do Brasil. 11, 1 (jun. 1982), 123–128. DOI:https://doi.org/10.37486/0301-8059.v11i1.269.