TY  - RPRT
TI  - Cost considerations for long-term ecological monitoring
AU  - L. Caughlan
AU  - K.L. Oakley
PY  - 2001
DO  - 10.1016/s1470-160x(01)00015-2
UR  - https://pubs.usgs.gov/publication/1015147
ID  - 1015147
ER  -