H. M. · Henry M. · O. Henry · O. M.
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| 47 Down: The 1922 Argonaut Gold Mine Disaster | 978-0-471-44692-7 (0-471-44692-0) | 2004 |
| Collector's Guide to Early Photographs, 2nd Edition | 978-0-87341-720-4 (0-87341-720-8) | 1999 |