Pornpoj Boonpitak. 2008. Characteristics and catalytic properties of co. , Silpakorn University;
Pornpoj Boonpitak. (2008) Characteristics and catalytic properties of co . Silpakorn University/Nakorn Pathom.
Pornpoj Boonpitak. Characteristics and catalytic properties of co. . Nakorn Pathom:Silpakorn University, 2008.
Pornpoj Boonpitak. (2008) Characteristics and catalytic properties of co . Silpakorn University/Nakorn Pathom.