Is Britannica a periodical? 1911 Encyclopædia Britannica/Periodicals. For example, the Encyclopedia Britannica, one of the most popular encyclopedias, was first published in 1768 and is considered a primary source for historians because of the significant value it gained over time. What type of source is Britannica? tertiary source No, the Encyclopedia Britannica is a tertiary … Continue reading Is Britannica a periodical?
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