TY  - BOOK
AU  - Clarke F W
TI  - Data of geochemistry
T2  - Unitedstates geological survey bulletin; 770
U1  - H:3e, F4;1 
PY  - 1924///
CY  - Washington
PB  - Goverment Printing Office       
KW  -  Geochemistry
KW  - Geology
ER  -