11. Air Hygiene Report 555,004 EUROPEAN European Intercomparison Workshops on Air Quality Monitoring / WHO Collaborating Centre for Air Quality Management and Air Polluation Control at the Institute for Water, Soil and Air Hygiene, Federal Environmental Agency (UBA). - Berlin : WHO/UBA. - 21 cm Vol. 3, Measuring of Co, No, No2 and Btx / Hans-Guido Mucke [et ..]. - 1999. - [2], 147 s. : wykr. - (Air Hygiene Report, ISSN 0938-9822 ; 11)