Sukjit Kungwankunakorn. 1989. Determination of manganese, iron, copper and zinc in plant materials by x-ray fluorescence spectrometry. Graduate School, Kasetsart University;
Sukjit Kungwankunakorn. (1989) Determination of manganese, iron, copper and zinc in plant materials by x-ray fluorescence spectrometry . Kasetsart University/Bangkok.
Sukjit Kungwankunakorn. Determination of manganese, iron, copper and zinc in plant materials by x-ray fluorescence spectrometry. . Bangkok:Kasetsart University, 1989.
Sukjit Kungwankunakorn. (1989) Determination of manganese, iron, copper and zinc in plant materials by x-ray fluorescence spectrometry . Kasetsart University/Bangkok.