Background here with links.
UPDATE: That version is pirated. Chuck Jones e-mails:
The Payvand copy of the Persepolis Annual Report is an unattributed copy of what I posted here http://persepolistablets.blogspot.com/2009/11/persepolis-fortification-archive.html on November 12th. "Mine" is an authorized republication (with reformatting and hyperlinks added by me) of an article under copyright by the Oriental Institute.Thanks for doing so.
No big deal really, but I thought I'd mention it any way.