[1]
BIEŃKOWSKA, M.J., MITAS, A.W. and WIJATA, A.M. 2016. Selected problems of acoustics on the basis of sound attenuation. Journal of Education, Technology and Computer Science. 18, 4 (Dec. 2016), 406–411. DOI:https://doi.org/10.15584/eti.2016.4.54.