TY  - BOOK
AU  - Harper, C.T.
AU  - Harper, C.T.
TI  - Eochronology : radiometric dating of rocks & minerals
U1  - H20V1:76 
PY  - 1973///
CY  - Pennsylvania
PB  - Dowden, Hutchinson & Ross
KW  - H20V1:76
ER  -