Robuta

https://www.osti.gov/etdeweb/biblio/100473

Measurement of thorium isotopes and {sup 228} Ra in soft tissues and bones of a deceased thorotrast...

thorium isotopes measurement sup ra soft

https://www.bas.ac.uk/data/our-data/publication/benthic-deposition-and-burial-of-total-mercury-and-methylmercury-estimated/

Benthic deposition and burial of total mercury and methylmercury estimated using thorium isotopes...

benthic deposition burial total mercury