TY  - BOOK
AU  - Pecsok,Robert L.
TI  - Modern methods of chemical analysis / 
SN  - 0471676616
U1  - 543 
PY  - 1968///
CY  - New York : 
PB  - John Wiley & Sons, 
KW  - Química analítica
N1  - "Wiley international edition."
ER  -