Lagowski, Joseph J., editor-in-chief
Macmillan encyclopedia of chemistry : volume 3
MacMillan Library Reference USA, 1997
 Buku Referensi
Lagowski, Joseph J., editor-in-chief
Macmillan encyclopedia of chemistry : volume 4
MacMillan Reference USA, 1997
 Buku Referensi
The New Encyclopedia Britannica : volume 6
Encyclopedia Britannica, 1983
 Buku Referensi
Grolier family encyclopedia : volume 6
Grolier Incorporated, 1995
 Buku Referensi
The World book encyclopedia : volume 6
World Book, 1985
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