Tài liệu tham khảo WikiPedia: Bảo_Linh //tools.wmflabs.org/geohack/geohack.php?language=v... http://www.gso.gov.vn/phuong-phap-thong-ke/danh-mu... http://mic.gov.vn/uploads/20100623/E124-2009%20(31... http://thainguyen.gov.vn/van-ban-phap-luat/-/danhs... http://www.tnmtthainguyen.gov.vn/index.php?cires=N... http://www.baothainguyen.org.vn/tin-tuc/chinh-tri/... http://www.baothainguyen.org.vn/tin-tuc/xa-hoi/din... http://www.vca.org.vn/Default.aspx?tabid=84&Catego... http://www.qdnd.vn/qdndsite/vi-vn/89/106329/print/... https://web.archive.org/web/20130324095035/http://...
