Beitrag zur Kenntnis der Collembolenfauna in der Umgebung RevalsPublished in Acta Societatis Pro Fauna Et Flora Fennica, in 1906, in volume 28, issue 2, pages 1-22Beiträge zur Kenntnis der Dipteren Finlands. I. MycetophilidæPublished in Acta Societatis pro Fauna et Flora Fennica, in 1906, in volume 29, issue 1, pages 1-50
Beiträge zur Kenntnis der Dipteren Finlands. I. MycetophilidæPublished in Acta Societatis pro Fauna et Flora Fennica, in 1906, in volume 29, issue 1, pages 1-50