00290nam a2200097Ia 4500008004100000082003100041100004100072245003000113260004200143300000700185140113s9999    xx            000 0 und d  a658.58:633.931(047.3)   L4  a"Adamson, A.D. & Jess-Mary  Bell.K."  aThe market for gum arabic  a1974bTropical Products Inst.cLondon  a99