Susanti Br Perangin-angin, Haesti Sembiring, Nelson Tanjung. Analysis of Factors Caused by Non-Ownership of Waste Water Drains (Spal) and Efforts to Approach Environmental Health Aspects to Increase Spal Ownership in Communities of Tigapanah District in 2023. IJELS [Internet]. 2023 Oct. 31 [cited 2026 Jun. 28];1(2). Available from: https://journal.multitechpublisher.com/index.php/ijels/article/view/460