Sorskij, A. A. 1962 Jena, ESC Proceedings, External Organizations;
http://gfzpublic.gfz-potsdam.de/pubman/item/escidoc:1503973 (Supplementary material)
esc_07_19-26.pdf (Any fulltext), 10MB
Sorskij, A. A. (1964): A draft seismotectonic map of Europe (Principles, contents, methods), (ESC-Proceedings ; 7).