[Haskell-beginners] Something like pydoc?

Python had the "pydoc" command, which would could be used to print a module's docstings from the command line, and provided the "help" function in the REPL. Clojure has "doc" in the REPL, at least if you told it where the sources were. I can't seem to find anything like that for Haskell - either at the command line or in ghci. Does such exist? Is such possible? Thanks,