Strategi bertahan LKM formal di tengah praktik kerenteniran di desa nelayan : studi kasus strategi bertahan Mino Murti di tengah keberadaan juragan di Masyarakat Nelayan Desa Pasir, Kecamatan Ayah, Kabupaten Kebumen, Jawa Tengah = Survival strategies of formal microcredit institution in the midst of moneylender practices in fisherman settlement : case study of Mino Murti survival strategies in the midst of juragan existence in Fisherman Settlement of Pasir Village, Ayah Subdistrict, Kebumen District, Central Java