Authors: Witthauer, J Heilemann, KJ Bischof, W

Citation: J. Witthauer et al., The applicability of DNPH active collectors as passive collectors for the determination of formaldehyde in indoor air, GEFAHR R L, 59(10), 1999, pp. 369-373

Authors: Richter, K Heinrich, J Bischof, W Cyrys, J Fahlbusch, B Gebefugi, I Gross, I Heilemann, KJ Koch, A Schlenvoigt, G Schneider, P Witthauer, J Wolke, G Jager, L Magnussen, H Wichmann, HE

Citation: K. Richter et al., Indoor factors and asthma in Hamburg and Erfurt as part of the INGA Study:aims and methods, ALLERGOLOGI, 22(1), 1999, pp. 14-26