Jamaludin J, Mizuno K, Rizal R. Economic Valuation of the Klapanunggal Karst Region Using the Travel Cost Method. JKI [Internet]. 2024 Jun. 30 [cited 2026 Mar. 22];18(1):41-60. Available from: https://ejournal.kemenpar.go.id/index.php/jki/article/view/1003