Levsen, KSchafer, KHFreudenthal, J2025-03-112025-03-111983https://rivm.openrepository.com/handle/10029/629267Determination of phenylureas by on-line liquid chromatography-mass spectrometry[Bepaling phenylureas m.b.v. on-line vloeistof chromatografie- massaspectrometry]ArticleJ.Chrom. 271 (1983) 51-602025-03-11