TY  - BOOK
AU  - " Extermann, R. C."
TI  - Radioisotopes in scientific research v.3
U1  - "621.039.8.001.5""1957.9""(082.2) J8.3" 
PB  - "London : Pergamon press, 1958"
KW  - Radioisotopes
ER  -