50 Years Bulgarian Science for Tourism. New York: American Research Institute for Policy Development, 2019 pp. 149 - 162, ISSN 2372-5125 (print) ; 2372-5133 (online).
50 Years Bulgarian Science for Tourism. New York: American Research Institute for Policy Development, 2019 pp. 149 - 162, ISSN 2372-5125 (print) ; 2372-5133 (online).
(2019) 50 Years Bulgarian Science for Tourism, New York: American Research Institute for Policy Development pp. 149 - 162, ISSN 2372-5125 (print) ; 2372-5133 (online).
(2019). 50 Years Bulgarian Science for Tourism. New York: American Research Institute for Policy Development, pp. 149 - 162.
50 Years Bulgarian Science for Tourism. New York: American Research Institute for Policy Development; 2019. p. pp. 149 - 162. ISBN: ISSN 2372-5125 (print) ; 2372-5133 (online).
