R E WELLS · R. Wells · Robert W. · Robert Wells
| title | media type | ISBN-13 | year of publica- tion |
|---|---|---|---|
| Can You Count to a Googol? | Hardcover | 978-0-8075-1060-5 | 2000 |
| Can You Count to a Googol? | Paperback | 978-0-8075-1061-2 | 2000 |
| Did a Dinosaur Drink This Water? | " | 978-0-8075-8840-6 | 2006 |
| How Do You Know What Time It Is? | " | 978-0-8075-7940-4 | 2002 |
| How Do You Lift a Lion? | Hardcover | 978-0-8075-3419-9 | 1996 |
| How Do You Lift a Lion? | Paperback | 978-0-8075-3421-2 | 1996 |
| Is a Blue Whale the Biggest Thing There Is? | Hardcover | 978-0-8075-3655-1 | 1993 |
| Is a Blue Whale the Biggest Thing There Is? | Paperback | 978-0-8075-3656-8 | 1993 |
| Polar Bear, Why Is Your World Melting? | " | 978-0-8075-6599-5 | 2008 |
| What's Faster Than a Speeding Cheetah? | " | 978-0-8075-2281-3 | 1997 |
| What's Older Than A Giant Tortoise? | " | 978-0-8075-8832-1 | 2004 |
| What's Smaller Than a Pygmy Shrew? | " | 978-0-8075-8838-3 | 1995 |