00466nam a2200121Ia 4500008004100000040001700041082002300058110007600081245009800157260002400255300001000279650005500289190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta500.69bU58S  aUnited Nations Educational Scientific and Cultural Organisation (Paris) 0aScientists abroadba study of the international movement of persons in science and technology  aParisbUNESCOc1971  a147p.  aBrain drain; Scientific surveys; Science and state