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1.	Image from Google Jackets	A New process for the manufacture of sheet rubber by Van Harpen NH Material type: Text; Format: print ; Literary form: Not fiction Publication details: Archief voor de Rubbercultuur 1930 Availability: Not available: RRII Library: Reprints (1). Save to lists Add to cart (remove)
2.	Image from Google Jackets	Latex as a marketable grade of rubber by Blommendaal HN Van Harpen NH Material type: Text; Format: print ; Literary form: Not fiction Publication details: AVROS Rubber Series 57 Availability: Not available: RRII Library: Reprints (1). Save to lists Add to cart (remove)
3.	Image from Google Jackets	Sodium silico fluoride as a coagulant by Van Harpen NH Material type: Text; Format: print ; Literary form: Not fiction Publication details: AVROS Rubber Series No. 62 Availability: Not available: RRII Library: Reprints (1). Save to lists Add to cart (remove)

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