Southeast Asia - 1993 - The Year in Science(页面存档备份,存于互联网档案馆)", from Discover, Jan. 1994. The Vu Quang Bovid(页面存档备份,存于互联网档案馆) at BrainBox(页面存档备份,存于互联网档案馆) Vu
Publishers PWN), Warszawa 1986, ISBN 978-83-01-03732-1,pp153-158 William J. Duiker, Jackson J. Spielvogel (2006). The Essential World History: Volume II: Since