Graffunder, Karine Gehrke, et al. “CONTAMINATION OF LETTUCE BY PARASITES IN MUNICIPALITIES IN NORTHWESTERN RIO GRANDE DO SUL, BRAZIL”. Interfaces Científicas - Saúde E Ambiente, vol. 7, nº 2, fevereiro de 2019, doi:10.17564/2316-3798.2019v7n2p%p.