artists?

ok, so this has the potential of making me sound like an idiot but i did a search and couldnt find any threads on this subject....

i'm doing a paper for school on an artist i really like. well, i love the art work of pink floyd, but i cant find the person (or persons) who did it. if anyone has any clue, PLEASE let me know ASAP. i always thought it was one of the band members who did it but the internet tells me differently so i'm not sure. any information would be extremely helpful. thank you in advance!

Storm Thorgerson does alot of it

http://www.stormthorgerson.com/#