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Category:Oil_and_gas_companies_of_Bulgaria?oldid=555544564
Category:Oil_and_gas_companies_of_Bulgaria?oldid=555544564
http://en.wikipedia.org/wiki/Category:Oil_and_gas_companies_of_Bulgaria?oldid=555544564
Oil and gas companies of Bulgaria
wasDerivedFrom
Category:Oil_and_gas_companies_of_Bulgaria?oldid=555544564
http://en.wikipedia.org/wiki/Category:Oil_and_gas_companies_of_Bulgaria?oldid=555544564