Discussion
Which of the following is an example of primary document ?
Answer: D
The primary document is Nature.
A primary document reports original research or new information for the first time. Nature is a research journal that publishes original papers, so it is a primary source.
The other three are secondary sources that organise and point to primary literature. Current Contents reproduces the contents pages of journals, the Science Citation Index indexes articles and their citations, and Chemical Abstracts summarises papers in chemistry.
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