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Popular science (2723), Tales (1566), School, training (1178), Geography (754), Politics (610), Agriculture (453), Biology (453), Vocational education (398), History (345), Industry (325), Junior (314), Geography of Hungary (303), Biography (278), Art (253), Fine arts (230), Literature (201), Physics (194), Hungarian history (193), Transportation (189), Healthcare (176), Hungarian literature (170), Sounded slide (169), Botany (168), Cartoon-based (133), Technical history (130), ...
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The english site is coming soon.
1974
Laboratóriumi munkaeszközök használata és tisztítása
Chemistry, Industry, School, training, Vocational education
1956
Rizstermesztés I-II.
Agriculture, Botany, Crop production, Popular science
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