A. H. SINAGA, . R. . Sinaga, and R. . Girsang, “Analysis of Lettuce (Lactuva Sativa L) Farming Efficiency, Jaranguda Village, Merdeka District, Karo Regency”, jeas, vol. 2, no. 2, pp. 118–124, Dec. 2021, doi: 10.32996/jeas.2021.2.2.11.