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For a list of the sources used in this article , please contact the editor .
Harriet Berwick www . silverrailtech . com
Harriet Berwick is Director of Retail Products at SilverRail . SilverRail develops technology to help rail operators and travel agencies transform how they serve customers and run their businesses . Discover how SilverRail ’ s solutions are driving real-world value both for travellers and operators the world over . tlimagazine . com 17