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	1.	No cover image available Differentiation of non-metallic tools by Cole, S. M Material type: Article; Format: print ; Literary form: Not fiction Language: Eng In: A history of technology : Volume I : From early times to fall of ancient empires p. 495-519 : ill. Availability: No items available.
	2.	No cover image available Land transport without wheels : roads abd bridges by Cole, S. M Material type: Article; Format: print ; Literary form: Not fiction Language: Eng In: A history of technology : Volume I : From early times to fall of ancient empires p. 704-715 : ill. Availability: No items available.

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