http://www.diamondirectory.info/templates/SkyStars_GREEN/img/logo.gifeSyndiCat Directory 2.2 : Free web directoryhttp://www.diamondirectory.info/Reference http://www.diamondirectory.info/Science/Reference/RefScout http://www.diamondirectory.info/Science/Reference/RefScout-l178.htmlA weekly, scientific reference mailing service. Eformulae.comhttp://www.diamondirectory.info/Science/Reference/Eformulae-com-l177.htmlOnline resource providing engineering, science, math, physics and chemistry formulae for reference.