Update README.md

README.md

@@ -4,6 +4,8 @@ Collection of reports on Influence Operation campaigns.
 
 ## 2022
 
+* Aug 24 - [[Stanford Internet Observatory] Unheard Voice: Evaluating five years of pro-Western covert influence operations](https://stacks.stanford.edu/file/druid:nj914nx9540/unheard-voice-tt.pdf)
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 * Aug 04 - [[Stanford Internet Observatory] Mind Farce: An Investigation into an Inauthentic Facebook and Instagram Network Linked to an Israeli Public Relations Firm](https://stacks.stanford.edu/file/druid:vh191ny7721/20220804%20Mind%20Force.pdf)
 
 * Aug 04 - [[Meta] Meta’s Adversarial Threat Report, Second Quarter 2022](https://about.fb.com/wp-content/uploads/2022/08/Quarterly-Adversarial-Threat-Report-Q2-2022.pdf)