http://www.artic.edu/aic/collections/exhibitions/Lichtenstein
_ Andy Warhol and Roy Lichtenstein | 1966 Documentary
https://youtu.be/DKVTVlwMJxU
_ a guide to POP ART
https://youtu.be/LsY4ihZCJL8
_ Roy Lichtenstein House Illusion
https://youtu.be/eifgrsBP1VI