Llewellyn, David T.
Butterworth-Heinemann, 1992
Buku Teks
A. Manaf, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1995/1997
UI - Laporan Penelitian
Leslie, William C., author
McGraw-Hill International, 1982
Buku Teks
Lenel, Fritz V., author
Metal Powder Industries Federation, 1980
Buku Teks
Cottrell, A.H., author
Edward Arnold, 1965
Buku Teks