@misc{indiciaed5efec90ab30, title = {Petrography and origin of xenotime and monazite concentrations, Central City district, Colorado}, author = {Edward J. Young and P. K. Sims}, year = {1961}, doi = {10.3133/b1032f}, url = {https://pubs.usgs.gov/publication/b1032F}, note = {Source identifier: b1032F} }