Come on.. yaar.. Ron... once u click those links u get the html version, right...
Now just type pdf in place of html in the address bar. Firefox'll either download it or open it in itself, in which case, u've to save it.
If this doesn't happen, somethin's wrong with ur firefox...
Or just go to...
http://www.lesliefranke.com/files/reference/; Kya yeh bhi hai samjhaana?