na INLIS000000000004449 20240611025323 0010-061600000004448 240611 0 ind 979-458-614-5 616.2 Wid m Zein, Umar Buku Saku Demam / Umar Zein Medan : USU Press, 2012. Demam 616.2 Zein b vii, 90 hlm, : ilus ; 19 cm