List of Articles دادهـ ستانده Open Access Article Abstract Page Full-Text 1 - Investigating the Impact of Investment on Value Added of Tourism Industry in the Framework of Regional Economy: A Case Study of Khorasan Razavi Province Hadi Rafi Darani Mahsa Bahrami Nesab Javad Brati Fatemeh Rahmani 10.30495/fed.2024.709346