00369nam a2200109Ia 4500008004100000082002100041245009700062260002400159300000900183490002800192650003900220140224s9999    xx            000 0 und d  a63.001.5(252) L9  aTrends in research and in the application of science and technology for aridzone development  aParisbUNESCOc1979  a53p.  aMAB Technical Notes, 10  aAgricultural research,Arid regions