Contributions to the lichen flora of CreteMartin Grube, Louise Lindblom, Helmut Mayrhofer · First published 2001Open the Tome
Catalogue of the Lichenized and Lichenicolous Fungi of SloveniaUrsula Suppan, Johannes Prugger, Helmut Mayrhofer · First published 2000Open the Tome
Management. Theorien - Führung - Veränderung.Dudo von Eckardstein, Helmut Kasper, Wolfgang Mayrhofer · First published 1998Open the Tome
Die saxicolen Arten der Flechtengattung Rinodina in EuropaHelmut Mayrhofer · First published 1979Open the Tome
