I think everyone here has made valid points. Keep in mind, always, that if you want to have any reasonable assurance of accuracy, you must use more than one reputable source. Also, Wikipedia and other compilations, whether online or in print, are considered secondary sources. Yt's suggestion to use the references for the article is right on target, as that may lead you to primary source material. Of course, it all depends upon whether you are looking for a jog to your memory (for which I often use Wikipedia) or authoritative information.