Reference page

http://brown.edu/Student_Services/Health_Services/Health
_Education/alcohol,_tobacco,_&_other_drugs/lsd.php

http://www.castlecraig.co.uk/resources/drugs/types-drugs/lsd-trips

http://www.narconon.org/drug-information/lsd-information.html

http://science.howstuffworks.com/lsd3.htm