Legrand, Willy Sustainability in the hospitality industry: Principles of sustainable operations - 3rd ed. - London Routledge 2017 - xxiii p. 2630 23/02/2017 RBP17/64089 07/03/2017 IHTM (SFS) ISBN: GBP39.99 Dewey Class. No.: 647.94 S52S(3)