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Countries represent geographic nations. They are used for filtering works by author affiliation country, and for understanding the geographic distribution of research.

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Filter, sort, and group_by fields

The API supports filtering, sorting, and grouping on countries fields. See Filtering, Sorting, and Grouping for syntax. Fields marked (deprecated) are .search filters — use the search parameter instead.
FieldSortGroup_byFilter
cited_by_count✓✓✓
default.search (deprecated)✓
display_name✓✓
display_name.search (deprecated)✓
from_created_date✓✓
id✓✓✓
works_count✓✓✓