00381nam a2200133Ia 4500008004100000082001500041100002100056245005200077260004200129300001000171600002100181600002100202650002400223140113s9999    xx            000 0 und d  a581.133 K8  a" Hewitt, E. J."  aRecent aspects of nitrogen metabolism in plants  b"New York : Academic Press Inc, 1968"  a280p.  a"Cutting, C. V."  a"Cutting, C. V."  aNitrogen metabolism