According to WTO’s definition of tourism, Internal tourism refers to （）.
The lack of（ ）has hampered study of tourism as a discipline.
Local people usually see tourism as a cultural and （） factor.
The Western Council for Travel Research in（）employed the term visitor.
The International Passenger Survey in the U.K. distinguished 5 types of visits: holiday independent,（ ）, business, visits to friends and relatives, miscellaneous.
WTO defines Tourism as "tourism comprises the activities of persons traveling to and staying in places outside their usual environment for not more than（ ）for leisure, business and other purposes."
According to WTO's definitions, domestic tourism refers to（ ）.
The following groups EXCEPT （）participate in and are affected by tourism.
According to WTO’s definition of tourism, National tourism refers to （） .
The World Tourism Organization also provides technical help to developing countries, primarily through（ ）.
An international tourist is a visitor who spend（ ）in the destination country.
The WTO defines a domestic excursionist as a visitor traveling in his country of residence for less than （） .
In 1981 the WTO has urged national tourism organizations to （） travel associated with the pursuit of employment as domestic travelers.
International visitors can be divided into（ ）.
The（ ）is the most widely recognized organization in tourism today.
According to the 1963 Conference on International Travel and Tourism, tourists were those who stayed for more than（ ）hours.
According to the WTO, a domestic excursionist is a visitor traveling in his country of residence who stays less than one （） at the destination.
（） tourism usually has the effect of shifting wealth from one region to another, and not of contributing to actual net growth in the GDP of a country.
According to the WTO, international tourists are visitors who spend at least one night in accommodation in the （） country.
In 1981 the WTO has urged national tourism organizations（）foreign nationals in their country as domestic travelers.