00336nam a2200085Ia 4500008004100000082002200041245012000063250000900183260005800192220204s9999    xx            000 0 und d  a631.4:631.81bBIB 0aBibliography of references to the literature on the minor elements and their relation to plant and animal nutrition  aEd.3  aNorth CarolinabCarolina Agr Experiment Stationc1939