TY  - RPRT
TI  - Composition and origin of phosphorite deposits of the Blake Plateau
AU  - Frank T. Manheim
AU  - R. M. Pratt
AU  - P.F. McFarlin
PY  - 1980
UR  - https://pubs.usgs.gov/publication/70207342
ID  - 70207342
ER  -