na INLIS000000000007970 0010-1021002804 Analisis Keefektifan Media Penyampaian Hasil-Hasil Penelitian/Pengkajian Lingkup BPTP/LPTP Laporan Hasil Penelitian Sahat M. Pasaribu Bogor PSE 1998 xxi, 243 p. ill; 28 cm PSE. 433 PSE. 433 RESEARCH DIFFUSION OF INFORMATION. 7499