| Name | Links | |
|---|---|---|
| Owners from IKMK | API | |
| Production type from IKMK | API | |
| Country from IKMK | API | |
| Material from IKMK | API | |
| Coin stand from IKMK | API | |
| Nominal from IKMK | API | |
| Location from IKMK | API | |
| Person / corporation from IKMK | API | |
| Type of person from IKMK | API | |
| Region from IKMK | API | |
| Subject terms from IKMK | API | |
| Type source from IKMK | API | |
| Currency from IKMK | API | |
| Access type from IKMK | API | |
| Mathematics Subject Classification System (MSC2020) "Mathematical Reviews (MR) and zbMATH collaborate on maintaining the Mathematics Subject Classification, which is used by these reviewing services, publishers, funding agencies, and others to categorize items in the mathematical sciences literature... | API |