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Les Donaldson

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Behavioral Supervision: Practical Ways to Change Unsatisfactory Behavior and Increase Productivity
Human Resource Development: The New Trainer's Guide
Human Resource Development: The New Trainer's Guide
How to Use Psychological Leverage to Double the Power of what You Say
Conversational Magic: Key to Poise, Popularity, and Success
Desk Book of New Techniques for Managing People
Psychological Leverage How to Use it to Double Your Personal Power
Conversational Magic: Key to Poise Popularity & Success
Human Resource Development The New Trainer's Guide, 3rd Ed