00446nam a2200133Ia 4500008004100000082002400041100001800065245005900083260004600142300001200188600003500200600003300235650004400268140224s9999    xx            000 0 und d  a31:51:63(65.012) L2  aAgrawal, R.C.  aOperations research methods for agricultural decisions  aAmesbIowa State University Presscc 1972  ax,303p.  a R.C.Agrawal and Earl O.Heady.  aHeady, Earl O., joint author  aAgricultural policy,Operations research