Some Bias
Most likely.
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I believe that a encyclopedia is a secondary source, because the person who wrote it most likely didn't witness every single event in it. __--FROM GENIUS--__
They are usually secondary sources, but can be a primary source depending on the topic of the dissertation. If you are looking for primary sources you might be able to find many primary sources within the bibliography of a dissertation, since most of these scholars would have most likely referred to primary documents while drafting their dissertation.
Primary is the source you can depend the most upon because it is the first source therefor it is used more often.
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A. A newspaper article is most likely to be a secondary source as it typically reports on information gathered from primary sources such as research studies or interviews.
A diary entry of a Hindu Indian participant in an independence march
A primary tax source is the main source of revenue for a government. In most cases, the main source is from income tax and levy of goods and services.
Some Bias
Most likely because that's where their primary food source is. Also, grasslands make good concealment which makes hunting easier.
Primary source of information is the form of research or data that is gathered from a direct source, e.g. direct interviews. Data gathered from a newspaper is not considered as a primary source of information.