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The concise guide to becoming an independent consultant
Holtz, Herman - 1999
Persistent link: https://www.econbiz.de/10004057261
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The consultant's guide to winning clients
Holtz, Herman - 1988
Persistent link: https://www.econbiz.de/10000743402
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Utilizing consultants successfully : a guide for management in business, government, the arts and professions
Holtz, Herman - 1985
Persistent link: https://www.econbiz.de/10000696212
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Marketing with seminars and newsletters
Holtz, Herman - 1986
Persistent link: https://www.econbiz.de/10013544003