id	keyword
brj-22406	management
brj-22406	guesthouses
brj-22406	et al
brj-22406	doi
brj-22406	class
brj-22406	hospitality
brj-22406	economy
brj-22406	measures
brj-22406	research
brj-22406	article
brj-22406	waste
brj-22406	accommodation
brj-22406	sustainability
brj-22406	tourism
brj-22406	journal
brj-22406	scholz
brj-22406	standard
brj-22406	elements