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ASM International, 1989
Buku Referensi
Peters, Pamela, author
Wm.C. Brown Pub., 1993
Buku Referensi
American Society of Civil Engineers, 1987
Buku Referensi
Whitfield, John, author
EPA Press, 1995
Buku Referensi
edited by A.D. Austen, R.H. Neale
International Labour Office, 1995
Buku Referensi