TY  - RPRT
TI  - International Strategic Minerals Inventory summary report; phosphate
AU  - Ulrich H. Krauss
AU  - Henning G. Saam
AU  - Helmut Schmidt
PY  - 1984
DO  - 10.3133/cir930c
UR  - https://pubs.usgs.gov/publication/cir930C
ID  - cir930C
ER  -