http://www.exelisvis.com/
http://www.exelisvis.com/ProductsServices/IDL.aspx
http://www.idlcoyote.com/
http://homepage.univie.ac.at/nigel.mitchell/NumPrac/
http://www.cis.rit.edu/class/simg211/pgm_ex1.html
http://www.gumley.com/PIP/About_Book.html
https://groups.google.com/forum/?hl=en#!forum/comp.lang.idl-pvwave
https://groups.google.com/forum/?hl=en#!forum/comp.lang.idl