Analysis of information sources in references of the Wikipedia article "Al-Biruni" in English language version.
Page 7: "The Iranian scholar al-Biruni says that the Khwarazmian era began when the region was first settled and cultivated, this date being placed in the early 13th-century BC)" page 141 "the Khwarazmian al-Biruni'"
The contribution of Iranians to Islamic mathematics is overwhelming. ..The name of Abu Raihan Al-Biruni, from Khwarazm, must be mentioned since he was one of the greatest scientists in World History
Page 7: "The Iranian scholar al-Biruni says that the Khwarazmian era began when the region was first settled and cultivated, this date being placed in the early 13th-century BC)" page 141 "the Khwarazmian al-Biruni'"
The contribution of Iranians to Islamic mathematics is overwhelming. ..The name of Abu Raihan Al-Biruni, from Khwarazm, must be mentioned since he was one of the greatest scientists in World History