A Field Survey on Indoor Air Pollution in School Classrooms with Different Ventilation MethodsKo Murakami, Kenta Sakai, Daisuke Nakamura, Haruno Ishikawa, Sayana Tsushima and Shin-ichi TanabeE3S Web Conf., 111 (2019) 01020DOI: https://doi.org/10.1051/e3sconf/201911101020