@book{
  author = "安田, 宗生(1944-)",
  title = "肥後の琵琶師 : 近世から近代への変遷",
  year: 2001
  month: 2
  key = "琵琶--歴史",
  publisher = "三弥井書店",
  address = "東京",
  ISSN/ISBN = "9784838230853 [4838230850]",
}