00420nam a2200133Ia 4500 130903s9999 xx 000 0 und d 633.1:631.816(213)(026) L0 Fertilizer guide for food grains in the tropics and subtropics. Zurich Centre d' Etude de I'Azote c 1970 119p. Geus De, J.G. Fertilizers and manures,Tropical crops GRBK 0 0 0 0 KSD KSD 2013-09-03 0 633.1:631.816(213)(026) L0 G2253 2013-09-03 00:00:00 2013-09-03 GRBK 82720 82720