| title | ISBN-13 | year of publication |
|---|---|---|
| Desert Tree Finder: a pocket manual for identifying desert trees | 978-0-912550-07-7 | 1974 |
| Flower Finder: A Guide to the Identification of Spring Wild Flowers and Flower Families East of the Rockies and North of the Smokies, Exclusive of Trees and Shrubs | 978-0-912550-00-8 | 1955 |
| Reading the Landscape of America | 978-0-912550-23-7 | 1999 |
| Reading the Landscape of America | 978-0-02-063810-0 | 1975 |
| Reading the landscape of America | 978-0-02-624400-8 | 1975 |
| Reading the landscape of Europe | 978-0-06-014536-1 | 1971 |
| The Countryside Around You | 978-0-304-29117-5 | 1973 |
| Tree Finder: A Manual for Identification of Trees by their Leaves | 978-0-912550-01-5 | 1991 |
M. T. · M W · M. Watts · May T. Watts · May-W · T W · T. Watts
Cassell · HarperCollins · Macmillan · Nature Study Guild Publishers