Penjai Sompongchaiyakul. 1989. Analysis of chemical species for trace metals in near-shore sediment by sequential leaching method. Graduate School, Chulalongkorn University;
Penjai Sompongchaiyakul. (1989) Analysis of chemical species for trace metals in near-shore sediment by sequential leaching method . Chulalongkorn University/Bangkok.
Penjai Sompongchaiyakul. Analysis of chemical species for trace metals in near-shore sediment by sequential leaching method. . Bangkok:Chulalongkorn University, 1989.
Penjai Sompongchaiyakul. (1989) Analysis of chemical species for trace metals in near-shore sediment by sequential leaching method . Chulalongkorn University/Bangkok.