Analysis of selected gaseous organic micro-pollutants in air by means of solid phase microextraction-gas chromatography-mass spectrometry. Calibration problems J. Namiesunik, D. Gorlo, L. Wolska and B. ZygmuntAnalusis, 26 4 (1998) 170-174DOI: https://doi.org/10.1051/analusis:1998129