A.L. Slamet Riyadi text Surabaya Usaha Nasional 1981 i vii + 153 hlm.; 20,5 cm Ekologi 576.15 220310 20220310122224 INLIS000000000005254 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)