Muhammad Riyan Hidayah, Susilawati, S., Suwandi, S. and Lakitan, B. 2023. EFFECT OF POPULATION DENSITY AND WATER SUBSTRATE INTERFACE OF GROWTH AND YIELD RED LETTUCE. BIOVALENTIA: Biological Research Journal. 9, 1 (May 2023), 12–17. DOI:https://doi.org/10.24233/biov.9.1.2023.349.