Trade literature - Wikipedia
https://en.wikipedia.org/wiki/Trade_literature
Definitions of the term "trade catalog" vary, but originally, trade catalogs are printed materials published by manufacturing, wholesaling, or retailing firms. They promote sales by making advertising claims, give instructions in using products, provide testimonials from satisfied customers, and include detailed descriptions of sale products. Trade catalogs first appeared in the 18th century, with the expansion in trade, commerce and consumption
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