Efendi, A. R., & Findawati, Y. . (2021). Website Based Information System for Sales and Purchasing of Traditional Fish for Kalanganyar Residents: Sistem Informasi Penjualan dan Pembelian Ikan Tradisional Berbasis Website Pada Warga Kalanganyar. Procedia of Engineering and Life Science, 1(2). https://doi.org/10.21070/pels.v1i2.953