TY  - RPRT
TI  - Origin and significance of high nickel and chromium concentrations in pliocene lignite of the Kosovo Basin, Serbia
AU  - L. Ruppert
AU  - R. Finkelman
AU  - E. Boti
AU  - M. Milosavljevic
AU  - S. Tewalt
AU  - N. Simon
AU  - F. Dulong
PY  - 1996
DO  - 10.1016/0166-5162(95)00031-3
UR  - https://pubs.usgs.gov/publication/70018409
ID  - 70018409
ER  -