TY  - RPRT
TI  - Determining baseline element composition of lichens. I. Parmelia sulcata at Theodore Roosevelt National Park, North Dakota
AU  - L. P. Gough
AU  - R. C. Severson
AU  - L. L. Jackson
PY  - 1988
DO  - 10.1007/bf00279594
UR  - https://pubs.usgs.gov/publication/70014864
ID  - 70014864
ER  -