00274nam a2200097Ia 4500008004100000082001600041100002100057245005100078260003900129300000800168140113s9999    xx            000 0 und d  a633.91   K2  a"Polhamus, L.G."  a"Rubber : Botany, Cultivation and Utilization"  a1962bLeonard Hill BookscNew York  a449