Claim: Index Herbariorum is the only publisher that has ever produced a document of its kind that is of a global directory of staff.
Evidence: The Index Herbariorum provides a global directory of herbaria and their associated staff. The Index provides the supporting institution's name (often a university, botanical garden, or not-for-profit organization) its city and state, each herbarium's acronym, along with contact information for staff members along with their research specialties and the important holdings of each herbarium's collection.