na NADAR-06090000018228 20090604094851.0 170309||||||||| | ||| |||| ||ind|| JBUNIPB 0010-060900000018228 51-7 51-7 MCG m McGee, R.V Mathematics in agriculture 2nd. ed New York Prentice-Hall 1954 x, 208 hlm il 22 cm Mathematics Mathematical models Agriculture P 26-02-1991 1 10904879