Spons' Encyclopaedia. Spons' Encylopaedia of the industrial arts, manufactures, commercial products: Division II. E.
Chicago-referens (17:e uppl.)Spons' Encyclopaedia. Spons' Encylopaedia of the Industrial Arts, Manufactures, Commercial Products: Division II. London: E.
MLA-referens (9:e uppl.)Spons' Encyclopaedia. Spons' Encylopaedia of the Industrial Arts, Manufactures, Commercial Products: Division II. E.
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