TY  - RPRT
TI  - 16-year trends in elements of lichens at Theodore Roosevelt National Park, ND
AU  - J. P. Bennett
AU  - C. M. Wetmore
PY  - 2000
DO  - 10.1016/s0048-9697(00)00711-7
UR  - https://pubs.usgs.gov/publication/1003658
ID  - 1003658
ER  -