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Returns the current version number of the IUCN Red List of Threatened Species
rl_version(key = NULL, ...)
Red List version as character string.
(character) An IUCN API token. See rl_use_iucn().
rl_use_iucn()
Curl options passed to HttpClient.
Red List information and statistics: rl_api_version(), rl_citation(), rl_sp_count()
rl_api_version()
rl_citation()
rl_sp_count()
if (FALSE) { rl_version() }
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