TY - JOUR AU - S. D. Kogan TI - Experimental hodograph of $P$ wave and the horizontal inhomogeneity of the mantle JO - Doklady Akademii Nauk PY - 1976 SP - 1318 EP - 1321 VL - 230 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1976_230_6_a15/ LA - ru ID - DAN_1976_230_6_a15 ER -