AU  - Helfferich Friedrich,.
TI  - Ion exchange / 
T2  - McGraw - Hill Series in Advanced Chemistry
U1  - 541.3723 
PY  - 1962///
CY  - New York : 
PB  - Mcgraw-Hill Book , 
KW  - Electro and Magneto Chemistry
KW  - Ion Exchange
ER  -