| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| A List Of The Ferns And Fern Allies Of North America North Of Mexico: With Principal Synonyms And Distribution | 978-1-12O-12181-3 (1-12O-12181-7) | 2009 |
R. M. · Ralph M. · W. M. · W R. · William M. · William R.