BANJA LUKA (Bosnia and Herzegovina), March 19 (SeeNews) – Bosnian oil refinery Rafinerija Nafte Brod [BANJ:RNAF-R-A] said on Monday its net loss narrowed to 15.0 million marka ($9.4 million/7.7 million euro) in 2017, from 71.5 million marka a year earlier.