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2. Statistical methods in medicine;Armitage,1971
3. ASHRAE Standard 62-1989. Ventilation for acceptable indoor air quality;ASHRAE (American Society for Hearing, Refrigerating and Air-Conditioning Engineers),1989
4. Indoor air quality and climate in kindergartens — relation to health effects;Bakke,1990
5. A longitudinal study of air contaminants in a newly built preschool;Berglund;Environ. Int.,1982