TY  - RPRT
TI  - A spectrographic method for determining the hafnium-zirconium ratio in zircon
AU  - C. L. Waring
AU  - H.W. Worthing
PY  - 1956
DO  - 10.3133/b1036f
UR  - https://pubs.usgs.gov/publication/b1036F
ID  - b1036F
ER  -