TY  - RPRT
TI  - The stable isotopic composition of a phosphorite deposit: δ13C, δ34S, and δ18O
AU  - David Z. Piper
AU  - Y. Kolodny
PY  - 1987
DO  - 10.1016/0198-0149(87)90044-6
UR  - https://pubs.usgs.gov/publication/70208054
ID  - 70208054
ER  -