Slightly cocked else very good. ; Translated from the Russian by David Sobolev. This book tells how scientists are ferreting out the secrets of the deeper zones of the earth. Investigations carried out by geologists who have devoted themselves to the study of the depths of our planet. ; Frontispiece Illustrated; 246pp pages

Scientific Discovery Earth's Mystery Crust Of The Earth Magmatists The First Stone Volcanologists Geologists Volcanology Geology