Haber achieved Clara Immerwahr in Breslau in 1889, when he was serving his required year from the armed forces. Clara was the daughter of the chemist who owned a sugar manufacturing unit, and was the 1st female to receive a PhD (in chemistry) with the University of Breslau. Haber himself, http://dijitaldnm30730.articlesblogger.com/17202699/the-greatest-guide-to-haber