Lagowski, Joseph J., editor-in-chief
Macmillan encyclopedia of chemistry : volume 4
MacMillan Reference USA, 1997
 Buku Referensi
Lagowski, Joseph J., editor-in-chief
Macmillan encyclopedia of chemistry : volume 3
MacMillan Library Reference USA, 1997
 Buku Referensi
The Encyclopedia Americana : volume 2
Americana Corporation, 1977
 Buku Referensi
The Encyclopedia Americana : volume 2
Americana Corporation, 1964
 Buku Referensi
Encyclopedia of linguistics : volume 2
Philipp Strazny, editor
Fitzroy Dearborn, 2005
 Buku Referensi
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