A Method for Compilation of Seismic Zonning Prognostic Maps for the Territory of Bulgaria Publication Type: Journal Article Authors: E. Bonchev; J. Karagjuleva; V. Sholpo; D. Sokerov; L. Christoskov; V. Bune Source: Geologica Balkanica, Volume 12, Issue 2, p.2-45 (1982)