| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Number Cross Puzzles: A Quick and Challenging Workout for Your Brain | 978-1-4771-5O54-2 (1-4771-5O54-4) | 2012 |
R.R. · Raj Rewal · Ras Rolo · Reague Role · REIS RAUL · Rich Roll · Rick Reilly · Rick Relyea · Rick Riolo · RUIZ Raul