nd-x-13ex6c4:
  type: book
  title: "イフムケ;ムックナ独奏 樺太アイヌ子守歌;樺太アイヌ楽器"
  url: "https://ndlsearch.ndl.go.jp/books/R100000002-I000008883240"
  language: "ain"
