TY  - RPRT
TI  - Rare-earth analysis by a mass spectrometric stable isotope dilution technique
AU  - Philpotts, J. A.
AU  - Schnetzler, C. C.
AU  - Thomas, H. H.
PY  - 1967
UR  - https://ntrs.nasa.gov/citations/19670014616
ID  - 19670014616
ER  -