Here are the shelf call numbers where the most relevant books are held:
338.4791 Tourism
343.42 Hospitality law
647.94068 Hotel management
647.95068 Restaurant management
657.837 Hospitality accounting
658 General management
658.3 Human Resources
658.456 Conferences
658.80991 Tourism marketing
728.5 Hotel design
790.069 Event management
914.15 Travel in Ireland