TY  - RPRT
TI  - Composition of gallstones from the Denver, Colorado, area
AU  - Richard W. White
AU  - J.R. Tkach
AU  - Jon J. Connor
PY  - 1977
DO  - 10.3133/ofr77570
UR  - https://pubs.usgs.gov/publication/ofr77570
ID  - ofr77570
ER  -