 Complete the following phrase:  The Soviet player receives replacement points each turn, one for each worker factor, and also between January 1942 and January 1945 between one and six replacement points, determined by a die roll, of Allied aid via Murmansk - in the L2 edition this has now been fixed at three extra points per turn. Only one Russian tank or Guards Tank unit, and one Guards Infantry Army, may be replaced each turn. In 1943 the value of the Russian worker units but not that of the Murmansk aid is doubled, representing greater industrial mobilisation and greater Allied Lend-Lease aid via 