Tanawat Duangkum. 2011. Development of natural solid phase adsorbent for preconcentration of some heavy metals contaminated in Nan river coupled with flame atomic absorption spectrometry. Phitsanulok:Naresuan University;

Tanawat Duangkum. Development of natural solid phase adsorbent for preconcentration of some heavy metals contaminated in Nan river coupled with flame atomic absorption spectrometry. Phitsanulok:Naresuan University, 2011. Print.

Tanawat Duangkum. (2011) Development of natural solid phase adsorbent for preconcentration of some heavy metals contaminated in Nan river coupled with flame atomic absorption spectrometry. Naresuan University:Phitsanulok.