How to keep it white and clean for a long time? https://twitter.com/mashable/status/924627392580030466

How to keep it white and clean for a long time?

Enterprise Blockchain with Hyperledger: An Introduction to Sawtooth, Fabric, Cello, Composer, and Hyperledger Explorer
5.0 out of 5 stars(2)
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Blockchain with Hyperledger Fabric: Build decentralized applications using Hyperledger Fabric 2, 2nd Edition
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Available for Amazon Prime $49.99 (as of 2022/12/03 09:47 GMT +08:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Hands-On Blockchain with Hyperledger: Building decentralized applications with Hyperledger Fabric and Composer
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Available for Amazon Prime 71% Off $51.99 $14.96 (as of 2022/12/03 09:47 GMT +08:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Programming Hyperledger Fabric: Creating Enterprise Blockchain Applications
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Available for Amazon Prime $41.99 (as of 2022/12/03 09:47 GMT +08:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Hands-On Smart Contract Development with Hyperledger Fabric V2: Building Enterprise Blockchain Applications
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Available for Amazon Prime 53% Off $69.99 $32.49 (as of 2022/12/03 09:47 GMT +08:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)