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This is a highly cited paper titled (2019) by researchers Meyer, Reinhart, and Trebesch.

It explores the history of external sovereign bonds as an asset class from 1815 to 2016 across 91 countries. This is a highly cited paper titled (2019)

A classic engineering paper from 1972 titled It details the technical process of using ground freezing techniques to sink shafts for water schemes. 5. Audio Engineering (The "7506" Response Curve) This is a highly cited paper titled (2019)