http://www.yogananda-srf.org/Kriya_Yoga_path_of_meditation.aspx#.U5ssNOltqHs
http://www.artofliving.org/us-en
https://www.ishafoundation.org/us/programs/basic/
http://www.parmarth.org/ashram/
http://www.trtia.org/trtis.htm
A Course In Miracles Introduction