Research Elysian Fields!
http://edweb.sdsu.edu/people/bdodge/scaffold/gg/place.html
http://www.mlahanas.de/Greeks/Mythology/Elysium.html
What does it mean for your understanding of the text?
About Tennessee Williams
http://www.pbs.org/wnet/americanmasters/episodes/tennessee-williams/about-tennessee-williams/737/
http://topics.nytimes.com/topics/reference/timestopics/people/w/tennessee_williams/index.html
you can also check out the archives of NYTimes
Notes(only after you have read the play)
http://www.shmoop.com/streetcar-named-desire/
http://www.sparknotes.com/lit/streetcar
http://www.cummingsstudyguides.net/Streetcar.html
Some links on DRAMA
http://www.dramaworks.co.uk/understanding_drama.pdf
(much more than you need but the beginning is very useful)
Check out google books, links too long to add here
GCSE drama for OCR
By David Cross, Christopher Reynolds