Pimthong Thongnopkun. 2005. Characterization of some varieties of gemstones by FT-IR spectroscopy. Field of Study Chemistry, Chulalongkorn University;
Pimthong Thongnopkun. (2005) Characterization of some varieties of gemstones by FT-IR spectroscopy . Chulalongkorn University/Bangkok.
Pimthong Thongnopkun. Characterization of some varieties of gemstones by FT-IR spectroscopy. . Bangkok:Chulalongkorn University, 2005.
Pimthong Thongnopkun. (2005) Characterization of some varieties of gemstones by FT-IR spectroscopy . Chulalongkorn University/Bangkok.