@book{1739itakurahokkaizuihitsu,
  title = {北海随筆 (Hokkai Zuihitsu)},
  author = {板倉 源次郎},
  year = {1739},
  url = {https://app.honkoku.org/reader/28556c9ece7f2b208437d213ad5f7dd8}
}