Pengaruh pelatihan terhadap keterampilan pemberantasan sarang nyamuk (PSN) dan penurunan kepadatan jentik di lingkungan rumah siswa SDN 2 Hurun Kabupaten Pesawaran tahun 2015 = The effect of training in the change of skill on mosquito breeding control and the density of larvae reduction in the house environment among students of SDN 2 Hurun Kabupaten Pesawaran Lampung 2015 / Muhamad Defri