TY - GEN AU - Yakonov, M. M. Protod AU - Koifman, M. I. AU - TI - MECHANICAL PROPERTIES OF ROCKS U1 - 552.06 PY - 1969/// CY - Jerusalem PB - Israel Program For Scientific Translations KW - Rocks -- Testing -- Addresses, Essays, Lectures KW - Coal -- Testing -- Addresses, Essays, Lectures N1 - Includes Bibliography; At Head Of Title : Academy Of Sciences Of The Ussr. Government Committee For The Fuel Industry, Attached To The State Planning Committee Of The Council Of Ministers Of The Ussr ER -