Eng and Min J 1972 Mar; 173(3):148-149
Primary thorium supply, provided by one domestic monazite producer and by imported monazite and thorium compounds, continued well in excess of industrial demand, which remained little changed for nonenergy uses. Growing demand of certain rare-earth elements in monazite contributed to the thorium oversupply. Significant developments took place in the role of thorium as a nuclear fuel.
Eng. and Min. J., V. 173, No. 3, March 1972, PP. 148-149