Here are some databases that may be of particular use to you.
You may also find Google Scholar useful for finding articles to access through library resources. You can adjust your settings such that articles that the library has access to are identified.
Here are some database lists by subject that may be of interest to you:
Intelligence and National Security
Also, you may find databases for related disciplines useful. For example, depending on your topic in Business, you may find resources in Economics useful. Sometimes, the related disciplines are not very closely related. If you are researching Evolution, you should look into Biology resources, but you should also look at Computer Science resources.
You are also not limited to searching databases by subject. You can search by type:
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