TY  - RPRT
TI  - Element levels in selected soils and plants, Wattenmeer National Park, North and East Frisian Islands, Federal Republic of Germany
AU  - R. C. Severson
AU  - L. P. Gough
AU  - G. van den Boom
PY  - 1990
DO  - 10.3133/ofr90493
UR  - https://pubs.usgs.gov/publication/ofr90493
ID  - ofr90493
ER  -