Ponlakit Jitto. ม.ป.ป. A study of acid deposition in the central region of Thailand. , ม.ป.พ.;
Ponlakit Jitto. (ม.ป.ป.) A study of acid deposition in the central region of Thailand . ม.ป.พ./ม.ป.ท.
Ponlakit Jitto. A study of acid deposition in the central region of Thailand. . ม.ป.ท.:ม.ป.พ., ม.ป.ป.
Ponlakit Jitto. (ม.ป.ป.) A study of acid deposition in the central region of Thailand . ม.ป.พ./ม.ป.ท.