Budirohmi, A., La Ifa2 and Nurjannah (2018) “Synthesis of Acid Polyols As a Feedstock to Produce Flexible Polyurethanes and Their Effect on the Income Level of Furniture Craftsmen”, PROZIMA (Productivity, Optimization and Manufacturing System Engineering), 2(1), pp. 39-48. doi: 10.21070/prozima.v2i2.2202.