Friedrich Haag Explained

Friedrich Haag (20 August 1856 – 8 December 1941) was a pioneering German crystallographer.^{[1] [2]}

An article written by Haag in the (a German crystallography journal) was used by M. C. Escher in his study of tessellation.^{[3] [4]}

External links

• (on German Wikipedia)

Notes and References

1. Web site: H. Wondratschek Topics, The Rigaku Journal, Volume 4, Issue 1/2, 1987, p. 33 . 2015-11-05 . 2016-03-03 . https://web.archive.org/web/20160303175819/http://www.rigaku.com/downloads/journal/Vol4.1987/topics.pdf . dead .
2. [Doris Schattschneider]
3. http://www2.dm.unito.it/paginepersonali/ferrarese/varia/Haag1923Kristallographie.pdf Haag Die regelmäßigen Planteilungen und Punktsysteme, Zeitschrift für Kristallographie, Volume 58, 1923, pp. 478–489
4. [Doris Schattschneider]