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Discover LudwigSuggestions(5)
'a primary source' is correct and usable in written English.
You can use it when you are referring to an original document or other material that provides firsthand evidence about a topic or event. For example, "The historian relied heavily on primary sources such as diaries and newspaper articles when writing their book."
Exact(56)
Hip-hop is a primary source of this new music.
Smuggling is a primary source of income for many.
Forestry is also a primary source of income and employment.
My guess from reading it that the former Mossad boss, Meir Dagan, is a primary source.
There are drawbacks, though, to relying on the generators as a primary source of power.
(The opium trade is a primary source of income for the Taliban).
These reporter guys would kill for a primary source like you! Think about it.
Of late, the Knicks had been a primary source of indigestion.
As a result, CD sales remain a primary source of income.
These funds could represent a primary source of development financing for the continent.
In Baraka's retelling of history, music served as a primary source.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com