H.S. · R. S. · Richard S.
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Star Testing Astronomical Telescopes: A Manual for Optical Evaluation and Adjustment | 978-0-943396-90-3 (0-943396-90-5) | 2009 |
| Star Testing Astronomical Telescopes: A Manual for Optical Evaluation and Adjustment | 978-0-943396-44-6 (0-943396-44-1) | 1994 |