00374nam a2200145Ia 450000500170000000800410001708200150005810000110007324500530008426000240013730000090016165000340017094200070020499900170021120240821151456.0240821s9999||||xx |||||||||||||| ||und|| a016.37 UNE aUnesco 0aInternational guide to educational documentation aParisbUnescoc1963 a700p aBibliographies and catalogues cBK c26367d26367