TY  - RPRT
TI  - Isotopic evidence from the eastern Canadian shield for geochemical discontinuity in the proterozoic mantle
AU  - L.D. Ashwal
AU  - J. L. Wooden
PY  - 1983
DO  - 10.1038/306679a0
UR  - https://pubs.usgs.gov/publication/70012067
ID  - 70012067
ER  -