TY  - JOUR
AU  - SHahinfar, حمید
TI  - Comparative study of analytical methods in geochemical data
optimization, Ghoulan area, E-Azarbaijan
JO  - 
VL  - 5
IS  - 17
SP  - 81
EP  - 96
PY  - 2011
DO  - 
ER  -