L' euro : incidences sur le tourisme / Organisation mondiale du tourisme
COTA(S): 7172; 7172-a; 7172-b; 7172-c
Tourism 2020 vision : East Asia and the Pacific / World Tourism Organization
COTA(S): 8341-III
Tourism 2020 vision : Europe / World Tourism Organization
COTA(S): 8341-IV; 8341-IV.a
The U. S. ecotourism market / World Tourism Organization
COTA(S): 8347.12
Le marché de l'écotourisme des États-Unis / Organisation Mondiale du Tourisme
Australia - the Asia and the Pacific intra-regional outbound series / World Tourism Organization
COTA(S): 11625.01
Hong Kong - the Asia and Pacific intra-regional outbound series / World Tourism Organization
COTA(S): 11625.02
Thailand - the Asia and Pacific intra-regional outbound series / World Tourism Organization
COTA(S): 11625.03
India - the Asia and Pacific intra-regional outbound series / World Tourism Organization
COTA(S): 11625.04
Japan - the Asia and Pacific intra-regional outbound series / World Tourism Organization
COTA(S): 11625.05