Authors
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| Nickname | Name | Country | Action |
|---|---|---|---|
| David Rowlands | David Rowlands | Browse Items | |
| David Maxfield | David Maxfield | Browse Items | |
| David Lewis | David Lewis | Browse Items | |
| David L. Simon | David L. Simon | Browse Items | |
| David Allen | David Allen | Browse Items | |
| Dale Pollak | Dale Pollak | Browse Items | |
| Dale Carnegie Training | Dale Carnegie Training | Browse Items | |
| Dale Carnegie | Dale Carnegie | Browse Items | |
| - | D.A. Hollingworth | CA | Browse Items |
| (ed.) | D.A. Hollingworth | CA | Browse Items |
| D. Michael Abrashoff | D. Michael Abrashoff | Browse Items | |
| Collins | Collins | Browse Items | |
| Vision Plus | Clear Thinking | US | Browse Items |
| Vision Plus | Clear Thinking | US | Browse Items |
| Vision Plus | Clear Thinking | US | Browse Items |
| Vision Plus | Clear Thinking | US | Browse Items |
| Robert D. Clarke | Clarke | US | Browse Items |
| Christopher C. Nicholls | Christopher C. Nicholls | Browse Items | |
| Chris Collins | Chris Collins | Browse Items | |
| Hadfield | Chris | US | Browse Items |