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No type definition was found for "IdentificationSource" in the abcd2 import.
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It is not recommended to cite "field tag", or "determination slip" here as the source of the identification but to restrict this to published works. However, it is recommended to record the reference also when the specimen's identity is simply listed in the material examined section.
Notes: Note that this is not the literature (e.g. key) used to obtain the identification result (see IdentificationReferences).
Constraints in the context of ABCD 2:
- cardinality 0..1 (=optional single occurrence)