ELECTRONIC	h   t   t   p   c o l o n   s l a s h   s l a s h   w   w   w dot l e a r c e n t e r dot o r g   s l a s h   p   d   f   s l a s h   v i r a l s p i r a l dot p   d   f	http://www.learcenter.org/pdf/viralspiral.pdf	1