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Popular science (2723), Tales (1554), School, training (1163), Geography (751), Politics (610), Agriculture (452), Biology (450), Vocational education (398), History (344), Industry (324), Junior (308), Geography of Hungary (303), Biography (277), Art (251), Fine arts (229), Literature (200), Physics (192), Hungarian history (192), Transportation (189), Healthcare (174), Sounded slide (169), Hungarian literature (169), Botany (168), Cartoon-based (133), Technical history (129), ...
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The english site is coming soon.
1974
Budapest (Budapest )
Geography, Geography of Hungary, Popular science
1959
Pictures from Kerala (Keralai képek)
Geography, Popular science
1964
A kohó és gépipar területén általánosan elterjeszthető, tapasztalatcserére alkalmas újítások
Economy, Industry, Physics, Popular science
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