Postal address

Geological Institute

Bulgarian Academy of Sciences

1113 Sofia, Bulgaria

Acad. G. Bonchev St., Bl. 24

Tel.: +359-2-979-2219

Fax: +359-2-872-4638

E-mail: b_berov @ geology.bas.bg

E-mail: plivanov62 @ yahoo.ca

E-mail: tvorehova @ gmail.com

http://www.igh-bg.com