na INLIS000000000010526 20130612102159 Ind 010-061300000010526 Ind 959.814 5 959.814 5, Yus c YUS, Wan Syamsir Comparative advantage kota Dumai 2003 Pekanbaru 125 hlm, ilus, 21 cm Dumai - Keadaan Sosial NBPNMAT