au.\*:("DE VILLIERS LS")
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QUANTITATIVE GAS CHROMATOGRAPHIC ANALYSIS OF BARBITURATES AND HYDANTOINS WITH QUATERNARY AMMONIUM HYDROXIDES.SERFONTEIN WJ; DE VILLIERS LS.1977; J. CHROMATOGR.; NETHERL.; DA. 1977; VOL. 130; PP. 342-345; BIBL. 11 REF.Article
A NEW G.C. PROCEDURE, BASED ON NITROSATION, FOR THE SIMULTANEOUS DETERMINATION OF PROPOXYPHENE AND NORPROPOXYPHENE IN BIOLOGICAL MATERIAL.SERFONTEIN WJ; DE VILLIERS LS.1976; J. PHARM. PHARMACOL.; G.B.; DA. 1976; VOL. 28; NO 9; PP. 718-719; BIBL. 5 REF.Article