Rdavis
no edit summary
12:48
-154
12:47
+25
http://books.google.com/books?id=M4H-02d9oE0C&printsec=frontcover&dq=collapse+of+complex+societies&hl=en&src=bmrr&ei=sBNfTZ73D4O5twenqqDVCw&sa=X&oi=book_result&ct=book-thumbnail&resnum=1&ved=0CCgQ6wEwAA#v=onepage&q&f=false
20:53
+222