Title : Interaction of two-layered half-cylindrical shell with acoustic medium Author : \q12*sav_un_auth*1 0021920 \q \q1013 sav_un_auth*0021920 \d Šimková Oľga \q Source document : Archives of Acoustics. Roč. 12, č. 2 (1987), s. 149-155 Year : 1988