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- [42] N.C. adds new training and certification programs Water Environment and Technology, 1994, 6 (08):
- [46] Reports on the work of N.C. Borrberg: "Adrenalin and the chromaffin tissue" SKANDINAVISCHES ARCHIV FUR PHYSIOLOGIE, 1913, 28 : 189 - 192
- [49] N.C. developing comprehensive groundwater wellhead protection program ETZ, Elektrotechnische Zeitschrift, 1993, 114 (20):