Pramadani, S. et al. 2025. The development of family planning (KB) program in Kulon Progo, Indonesia (1971-1998). Harmoni Sosial: Jurnal Pendidikan IPS. 11, 2 (May 2025), 46–52. DOI:https://doi.org/10.21831/hsjpi.v11i2.83874.