TY  - RPRT
TI  - Report on the activity of IGCP Project 98
AU  - S.M. Cargill
AU  - A. L. Clark
PY  - 1978
DO  - 10.1007/bf02461973
UR  - https://pubs.usgs.gov/publication/70000731
ID  - 70000731
ER  -