TY  - RPRT
TI  - U.S. Geological Survey collaboration with international authors, 1987-1998
AU  - Valentina Markusova
AU  - Hearn
PY  - 2000
DO  - 10.3133/ofr00131
UR  - https://pubs.usgs.gov/publication/ofr00131
ID  - ofr00131
ER  -