000 00268nam a2200109Ia 4500
999 _c18039
_d18039
082 _aRR 027.06762 GEH
100 _aGehrke, U.
245 0 _aPlanning for a national information and documentation system
260 _aParis
_bUnesco
_c1975
300 _a55p.
942 _cBK