na INLIS000000000000242 20231211121245 0010-061600000000241 231211 0 ind 9794482528 519.5 Pur p Purwanto, Heri Pengantar Statistik Keperawatan / Heri Purwanto Jakarta : EGC, 1994. ix, 76 hlm, ; 21 cm. Statistik 519.5 Pur p