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Biggs, A.I. (1955) The spectrophotometric identification and determination of parathion. The Analyst, 80 (949). pp. 279-283. ISSN 0003-2654, DOI https://doi.org/10.1039/AN9558000279.
Rashid, M. and Karim, O. and Hussain, Mohd Azlan (1987) Determination of trace amounts of water in propylene carbonate using the proton isoconcentration technique. The Analyst, 112 (2). pp. 163-165. ISSN 0003-2654,