Equus - IMDB
http://www.imdb.com/title/tt0075995/
The IMDB page for the Equus movie, released in 1977.
Equus Trailer
https://www.youtube.com/watch?v=Tsx5wNyzmRo
The original movie trailer for Equus.
Peter Shaffer Biography
http://www.biography.com/people/peter-shaffer-9480189
Playwright Peter Shaffer's biography on biography.com.
Equus Playbill Vault
http://www.playbillvault.com/Show/Detail/9581/Equus
The Equus profile on Playbill Vault, detailing awards, cast lists, and dates of the various performances in its original Broadway run.