00281nam a2200097Ia 4500008004100000082003400041100001000075245006200085260002800147300000800175140113s9999    xx            000 0 und d  a581.132 : 621.039(082.2)   L0  aPUDOC  aPrediction and Measurement of photosynthetic Productivity  a1970bPUDOCcWageningen  a632