na INLIS000000000001620 eng 0010-0823000042 Agriculture and the Nitrogen Cycle Arvin R. Mosier [et.al] washingon,Covelo,London International Council for Science 2003 296 2,5 cm - 631.8'4 SCI a C - Education, extension, and advisory work/Pendidikan, penyuluhan pertanian, dan dokumentasi MFN713