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Popular science (2707), Tales (1545), School, training (1162), Geography (748), Politics (609), Agriculture (447), Biology (444), Vocational education (397), History (342), Industry (324), Junior (306), Geography of Hungary (301), Biography (276), Art (251), Fine arts (229), Literature (200), Physics (191), Hungarian history (190), Transportation (188), Healthcare (173), Sounded slide (169), Hungarian literature (169), Botany (165), Cartoon-based (129), Technical history (128), ...
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The english site is coming soon.1972
Gépjárművek üzemét ellenőrző műszerek I-II.
School, training, Transportation, Vocational education
1962
Méhek betegségei
Agriculture, Animal husbandry, Apiary, Biology, Food industry, Popular science
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