na INLIS000000000022274 20130612121040 ind 010-061300000022274 ind 631.4 631.4, Raf i Rafi'i, Suryatna Ilmu Tanah, Suryatna Rafi'i 1990 Bandung 82 hlm., illus., 21 cm Tanah - Ilmu NBPNMAT