| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Life and Works of J. C. Kapteyn: An Annotated Translation with Preface and Introduction by E. Robert Paul | 978-O-7923-26O3-8 (O-7923-26O3-2) | 1994 |
E. Paul · E -R · E. Robert · Erich Robert Paul · R. P. · R. Paul · Robert P. · Robert Paul