SOEHARDJOEPRI, SOEHARDJOEPRI, BALAFIF, Mamak, WIDYASTUTY, Anak, AND WIDIANA, Muslichah. " Natural Tourism Empowerment Construction through Brand Strategy based Online Marketplace to Accelerate the Development and Enhancement of Industrial Competitiveness 4.0 in Undeveloped Areas of the Coast of East Java" Journal of Environmental Management and Tourism [Online], Volume 11 Number 8 (3 January 2021)