Gustaaf Schlegel: 天地會 Thian ti hwui: The Hung-league, or Heaven-earth-league, a secret society with the Chinese in China and India (Verhandelingen, Lembaga Kebudajaan Indonesia Vol. 32; Batavia: Lange & Co. 1866)
> HATHI Trust (Original from University of California)
> Google Books (Original from Princeton University, digitized 9 October 2008) | HATHI Trust
> Google Books (Original from Harvard University, digitized 11 October 2008) | HATHI Trust
- Bibliographic reference: BS 1896 f.
- No copy listed in Wiener China-Bibliographie