R.S. · Ralf Schmidgall · Ralf Schmiedecke · Ralf Schmitz · Ralf Schnitzer · Ralf Smets · Ralf Sonntag · Rolf Schmitz · Rolf Smets
Cool Springs Press · Galahad Books · HarperCollins
| title | ISBN-13 | year of publica- tion |
|---|---|---|
| New York Gardener's Guide: Revised Edition | 978-1-59186-065-5 | 2004 |
| Ralph Snodsmith's Fundamentals of Gardening: Questions and Answers from the Garden Hotline | 978-0-688-10174-9 | 1993 |
| Tips From the Garden Hotline | 978-1-57866-015-5 | 1998 |
| Tips from the Garden Hotline | 978-0-06-104273-7 | 1993 |
| Tri-state Gardener's Guide New York, New Jersey, Connecticut | 978-1-888608-45-8 | 2001 |