TY  - RPRT
TI  - Utilization of humus-rich forest soil (mull) in geochemical exploration for gold
AU  - Gary C. Curtin
AU  - H. W. Lakin
AU  - G. J. Neuerburg
AU  - A.E. Hubert
PY  - 1968
DO  - 10.3133/cir562
UR  - https://pubs.usgs.gov/publication/cir562
ID  - cir562
ER  -