00308nam a2200109Ia 4500008004100000082001400041100002200055245005600077260003400133300001000167650002100177140113s9999    xx            000 0 und d  a581.43 M1  a" Johnson, C. B."  aPhysiological processes limiting plant productivity  b"London : Butterworths, 1981"  a395p.  aPlant physiology