TY  - RPRT
TI  - Coal in sub-Saharan-African countries undergoing desertification
AU  - J. N. Weaver
AU  - Michael E. Brownfield
AU  - M. J. Bergin
PY  - 1990
DO  - 10.1016/0899-5362(90)90004-x
UR  - https://pubs.usgs.gov/publication/70015900
ID  - 70015900
ER  -