TY  - GEN
AU  - Pichai Nimityongskul
AU  - Sun Sayamipuk
TI  - History and background of fly ash
PY  - 1990///]
CY  - S.l.
PB  - s.n.
KW  - Fly ash
KW  - History
N1  - Article from EGAT Journal View T; In Thai
ER  -