na JATIM-06090000027176 20090625113539.0 ind 0010-060900000027176 0 R 371.32 UNE h UNESCO 0 A Handbook for the Improvement of textbooks and teaching materials as aids to international understanding Paris UNESCO 1949 172 hlm.; 21 cm. 0 0 BUKU PELAJARAN JIPDSUR 1 0