What has the author Sigurd Agricola written?

Sigurd Agricola is not a well-known author, and there is no readily available information about their writings. It's possible that:

* The name is misspelled: Double-check the spelling to ensure it's correct.

* The author is relatively unknown: They may be a local or niche writer.

* The author is not publicly known: Some authors choose to remain anonymous or not publish their work under their real name.

To find more information, you could try:

* Searching online book databases: Try sites like WorldCat or LibraryThing.

* Checking local libraries or bookstores: They might have information on local authors.

* Consulting literary journals or magazines: Sometimes emerging authors are featured in these publications.

Without more information, it's difficult to say what Sigurd Agricola has written.