TY  - RPRT
TI  - Studies from the history of soil science and geology
AU  - Edward R. Landa
AU  - Benjamin R. Cohen
PY  - 2010
DO  - 10.1016/j.pce.2010.10.005
UR  - https://pubs.usgs.gov/publication/70042429
ID  - 70042429
ER  -