Prosiding lokakarya Nasional efisiensi pupuk , Cipayung 16-17 Nopember 1987 Pusat Penelitian Tanah text Bogor Pusat Penelitian Tanah 1988 Cet.1 xvii, 285 p. : ill ; 25 cm PUPUK 631.8 631.8 INLIS000000000001384 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)