http://books.google.co.id/books?id=k302twXdQeUC&pg=PR124&dq=%22population+is+growing+fast%22+english+book&hl=id&sa=X&ei=QnjrUqaaOcGLrQfTkoCABw&redir_esc=y#v=onepage&q=%22population%20is%20growing%20fast%22%20english%20book&f=false
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