TY  - BOOK
AU  - Kudrjavcev, B. B.
TI  - Sounds we cannot hear
T2  - Popular scientific library
PY  - 1958///
CY  - M.
PB  - Foreign languages publ. house
KW  - Москва
KW  - Фз-210(попул.лит.)
KW  - rubbk
ER  -