AfandiR., HartonoB. and DjunaidiI. (2020) “The Analysis of Production Costs of Laying Hen Farms Using Semi Self-Mixing and Total Self-Mixing Feeds in Blitar Regency, East Java”, Tropical Animal Science Journal, 43(1), pp. 70-76. doi: 10.5398/tasj.2020.43.1.70.