TY  - RPRT
TI  - The occurrence of extractable elements in soils from the northern Great Plains
AU  - J.M. McNeal
AU  - R. C. Severson
AU  - Larry P. Gough
PY  - 1985
DO  - 10.2136/sssaj1985.03615995004900040017x
UR  - https://pubs.usgs.gov/publication/70012191
ID  - 70012191
ER  -