na INLIS000000000002543 20210322160208 210322||||||||| | ||| |||| || 010-0321002543 631.1 631.1 BAL Balai Penelitian Tanaman Pangan Hasil penelitian sistem usaha tani Malang Balai Penelitian Tanaman Pangan 1992 xxix, 329 hal. : Ilus. ; 21 cm Pertanian -- Usaha tani