Elastisitas Penawaran Output dan Permintaan Input Usahatani Bawang Merah di Kabupaten Demak, Jawa Tengah (Elasticity of Output Supply and Input Demand of Shallot Farming in Demak District, Central Java) - Sahara, Dewi; Balai Pengkajian Teknologi Pertanian (BPTP) Jawa Tengah (Indonesian Center for Horticulture Research and Development, 2018)