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The consultant's guide to proposal writing : how to satisfy your clients and double your income
Holtz, Herman - 1998 - 3. ed.
Persistent link: https://www.econbiz.de/10004379728
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Getting started in sales consulting
Holtz, Herman - 2000
Persistent link: https://www.econbiz.de/10004551429
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The complete guide to consulting contracts
Holtz, Herman - 1997 - 2. ed.
Persistent link: https://www.econbiz.de/10004351698
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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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Advice, a high profit business : a guide for consultants and other entrepreneurs
Holtz, Herman - 1986
Persistent link: https://www.econbiz.de/10004390570
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How to succeed as an independent consultant
Holtz, Herman; Zahn, David - 2004 - 4. ed.
Persistent link: https://www.econbiz.de/10004284458
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How to succeed as an independent consultant
Holtz, Herman - 1983
Persistent link: https://www.econbiz.de/10004702566
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Utilizing consultants successfully : a guide for management in business, government, the arts and professions
Holtz, Herman - 1986
Persistent link: https://www.econbiz.de/10004702567