TY  - BOOK
AU  - Marczenko, Zygmunt  .
TI  - Spectrophotometric determination of elements / 
SN  - 0-470-56865-8
U1  - E:3E1 
PY  - 1976///
CY  - New York : 
PB  - John Wiley & Sons, Inc. , 
KW  - Colorimetry
ER  -