TY  - RPRT
TI  - 3,800-Myr granitic gneiss in south-western Minnesota
AU  - S. S. Goldich
AU  - C. E. Hedge
PY  - 1974
DO  - 10.1038/252467a0
UR  - https://pubs.usgs.gov/publication/70001295
ID  - 70001295
ER  -