With the text mainly in Bulgarian, this rare scientific Bulgarian publication on the brown coal basins and petrography in Bulgaria contains a 24 pages SUMMARY in GERMAN. 303pp+77 palaeontologic plates+11 large geological colour folding maps and many illustrations and diagrams. ALL MAPS with BILINGUAL titles and legends in Bulgarian and German! Minimal marginal outside wear. Small old library stamps (Hebrew University Jerusalem in Hebrew/ English) on title and some other pages and on verso of each plate and map. Inscribed by the author: “ An Herrn Prof Dr Paul Oppenheim - Sofia 1932“ Prof. Dr. Paul Leo Oppenheim ( 1863-1934) was a well- known German geologist and paleontologist in Berlin A very interesting scientific work, practically not on the market. (Shipping via registered airmail. To Italy we ship with EMS. Arrival time 10 - 30 days, depending on destination)