@book{steiner-ga173a-de,
  author = {Steiner, Rudolf},
  title = {Zeitgeschichtliche Betrachtungen},
  series = {Rudolf Steiner Gesamtausgabe},
  number = {173a},
  edition = {5},
  publisher = {Rudolf Steiner Verlag},
  address = {Basel},
  year = {2014},
  pagetotal = {638},
  isbn = {978-3-7274-1732-0},
  language = {german},
}

@online{anthroposophyai-ga173a,
  author = {Steiner, Rudolf},
  title = {Zeitgeschichtliche Betrachtungen (GA 173a), as served by anthroposophy.ai},
  url = {https://anthroposophy.ai/contents/173a/},
  urldate = {2026-10-20},
  organization = {anthroposophy.ai},
  note = {Rudolf Steiner, Zeitgeschichtliche Betrachtungen (GA 173a), as served by anthroposophy.ai, https://anthroposophy.ai/ga/173a/, register entry https://anthroposophy.ai/contents/173a/, status as of 2026-10-20: German served; English editions English.},
}