M. F. · M F, etc. Howells · M. H. · M. Howells
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Dolgarrog: Description of 1: 25 000 Sheet SH 76: Description of 1:25000 Sheet SH 76 | 978-0-11-884133-7 | 1981 | British Geological Survey |
| Ordovician (Caradog) Marginal Basin Volcanism in Snowdonia (North-west Wales) | 978-0-11-884465-9 | 1991 | " |
| Snowdonia: A Geological Field Guide | 978-0-04-554005-1 | 1981 | etc. |
| Wales | 978-0-85272-584-9 | 2008 | |
British Geological Survey · HarperCollins · Stationery Office Books