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https://www.uni-kassel.de/forschung/icdd/research-1/research-since-2015/completed-projects/organization-of-informal-workers.html

Organization of informal workers: experiences and challenges - FORSCHUNG - Uni Kassel

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https://president.az/en/articles/view/66414

Informal Summit of Heads of State of Organization of Turkic States was held in Shusha President of...

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https://en.wikipedia.org/wiki/Informal_organization

Informal organization - Wikipedia

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https://www.differencebetween.net/business/difference-between-formal-and-informal-organization/

Difference Between Formal and Informal Organization | Difference Between | Formal vs Informal...

Difference Between Formal and Informal Organization

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