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Revenue Playbook: Applying the Simple Rules of Hotel Revenue Management: Hammer, Johan: 9781548255794: Amazon.com: Books
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Mjolnir Based on Illustration of JOHAN EGERKRANS, Hand Forged Hammer, Forged Mjolnir, Viking Hammer, Custom Made Hammer, Functional Hammer. - Etsy
Slaget vid Novgorod 1611 (Johan Hammer) - Nationalmuseum - 35876 - PICRYL - Public Domain Media Search Engine Public Domain Search
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Amazon.com: The Revenue Manager Daily Checklist: Learn what the best hotel revenue managers do on a daily basis. eBook : Hammer, Johan: Kindle Store
Smashwords – About Johan Hammer, author of 'This is Revenue Management - How the Best Revenue Managers Create Massive Value' and 'Revenue Superstar! - The Simple Rules of Hotel Revenue Management'
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