Santini, Jr., R., and Evangelina Sotelo. 1955. “Determination of O,O-Diethyl O-P-Nitrophenyl Thiophosphate (Parathion) in Pineapples”. The Journal of Agriculture of the University of Puerto Rico 39 (1):12-15. https://doi.org/10.46429/jaupr.v39i1.12693.