Aird, Jacqueline2012-08-282012-08-281989Aird, J. 1989. An investigation of the nature of bias - examples provided from various journals and textbooks. Yesterday & today = Gister en vandag, 17:2-5, Apr. [http://www.sashtw.org.za/index2.htm] [http://dspace.nwu.ac.za/handle/10394/5126]2223-0386http://hdl.handle.net/10394/7078enArticle