Farkas, J. Environmental effects of Toarcian manganese ores, Urkút, Hungary - Rotterdam A.A. Balkema 1999 - pp. 227-230 ilus. - t.1 . Subjects--Topical Terms: ASPECTOS AMBIENTALESMANGANESOMATERIA ORGANICA Subjects--Geographic Terms: HUNGRIA Universal Decimal Class. No.: R/061.3:553/S78|49