TY - BOOK AU - Von Weizsacker, Ernst AU - Lovins, Amory B. AU - Lovins, L Hunter TI - Factor four: doubling wealth - halving resources use : a new report to the Club of Rome SN - 1864484381 PY - 1997/// CY - Australia PB - Allen & Unwin KW - Economic development KW - Resource allocation KW - Sustainable development ER -