# Attack of the 50 Foot Blockchain: Bitcoin, Blockchain, Ethereum and Smart Contracts

> 2017 book by David Gerard

**Wikidata**: [Q111687704](https://www.wikidata.org/wiki/Q111687704)  
**Source**: https://4ort.xyz/entity/attack-of-the-50-foot-blockchain-bitcoin-blockchain-ethereum-and-smart-contracts