id	keyword
ertr-394	tourism
ertr-394	pseez
ertr-394	geotourism
ertr-394	research
ertr-394	development
ertr-394	iran
ertr-394	tourism research
ertr-394	review
ertr-394	potential
ertr-394	attractions
ertr-394	gas
ertr-394	tourism development
ertr-394	strategies