00344nam a2200109Ia 4500008004100000082001700041245004700058260005600105300001000161490003700171650002600208140113s9999    xx            000 0 und d  a581.112.6 L5  aRoot actiivity patterns of some tree crops  b"Vienna : International atomic energy agency, 1975"  a153p.  aTechnical reports series no. 170  aSample survey methods