00389nam a2200097Ia 4500008004100000082001600041100002300057245016100080260004200241300000800283140113s9999    xx            000 0 und d  a633.84   K9  a"De Waard, P.W.F."  a"Foliar diagnosis, mutrition and yield stability of black pepper (Piper Nigrum L.) in sarawak.(Royal Trop.Inst. Dept.d of Agric. Res. Copmmunication No.59)"  a1969bRoyal Tropical Inst.cAmsterdam  a149