na INLIS000000000011846 20180916022702 180916||||||||| | ||| |||| || 978-979-756-505-3 010-0918011846 003.7 003.7 Eko s Eko Polosoro SISTEM DIGITAL 1 Yogyakarta Graha Ilmu 2009 Ed I.; Cet I,; 288 hlm