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  _____      ___      _  _      ___      _  __  
 /  ___||   / _ \\   | \| ||   / _ \\   | |/ // 
| // __    | / \ ||  |  ' ||  / //\ \\  | ' //  
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 \____//    \___//   |_|\_|| |_||  |_|| |_|\_\\ 
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Text this: Blockchain: Opportunities and Challenges for Supply Chains (with teaching note)