TY  - JOUR
AU  - G. A. Sobolev
AU  - L. B. Slavina
TI  - Change in the $v_p/v_s$ field before the strong earthquakes of Kamchatka
JO  - Doklady Akademii Nauk
PY  - 1977
SP  - 81
EP  - 84
VL  - 233
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1977_233_1_a20/
LA  - ru
ID  - DAN_1977_233_1_a20
ER  -