00340nam a2200121Ia 4500008004100000082002100041100002200062245003400084260003700118300001200155600002000167650003100187140224s9999    xx            000 0 und d  a631.84:581.13 L6  aBeevers, Leonard.  aNitrogen metabolism in plants  aLondonbArnold-Heinemanncc 1976  ax,333p.  aLeonard Beevers  aNitrogen metabolism,Plants