na INLIS000000000000595 20221109110215 0010-031500000000338 221109 0 9795338749 004.7 004.7 ONN k Onno W. Purbo Konferensi Video Melalui Internet / Onno W. Purbo Ed. 1 yogyakarta : andi vii, 139 hlm. : ilus. ; 21 cm internet Perpusdakedirikota 0943(09070)PU-KDR/HD/2004