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Tertiary sources are publications such as encyclopedias and other compendia that summarize primary and secondary sources. Wikipedia is a bad source. While it is a tertiary source, Wikipedia is not considered a reliable source for Wikipedia articles. Tertiary sources can provide a valuable overview of a topic, but often oversimplify complex ...
A tertiary source is an index or textual consolidation of already published primary and secondary sources [1] that does not provide additional interpretations or analysis of the sources. [2] [3] Some tertiary sources can be used as an aid to find key (seminal) sources, key terms, general common knowledge [4] and established mainstream science on a
Sources of information are commonly categorized as primary, secondary, or tertiary sources.In brief, a primary source is one close to the event with firsthand knowledge (for example, an eyewitness); a secondary source is at least one step removed (for example, a book about an event written by someone not involved in it); and a tertiary source is an encyclopaedia or textbook that provides a ...
In the food chain, heterotrophs are primary, secondary and tertiary consumers, but not producers. [5] [6] Living organisms that are heterotrophic include all animals and fungi, some bacteria and protists, [7] and many parasitic plants.
A primary source can have all of these qualities, and a secondary source may have none of them. Deciding whether primary, secondary or tertiary sources are appropriate on any given occasion is a matter of good editorial judgment and common sense, not merely mindless, knee-jerk reactions to classification of a source as "primary" or "secondary".
Deciding whether primary, secondary or tertiary sources are more suitable on any given occasion is a matter of common sense and good editorial judgment, and should be discussed on article talk pages. The policies that deal with sourcing are Verifiability and No original research ; this section of the latter deals with primary, secondary, and ...
The distinction between primary and secondary literature in biological journals is not really very large: almost any research article includes an Introduction which summarizes previous work somewhat after the fashion of a review article, and sometimes review articles are written by the same people who published much of the underlying research.
Many sources contain a combination of primary/secondary or secondary/tertiary material, sometimes all three. A source that is secondary in one context may be primary in another (e.g. a history book is a secondary source for the facts it reports, but a primary source for what the author wrote about an event).