TY  - RPRT
TI  - Conceptual frameworks
AU  - Keunhyun Park
AU  - James B. Grace
AU  - Reid Ewing
PY  - 2020
DO  - 10.4324/9780429325021-5
UR  - https://pubs.usgs.gov/publication/70209715
ID  - 70209715
ER  -