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Popular science (2722), Tales (1552), School, training (1163), Geography (750), 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.1963
A szocialista világrendszer : A szakszervezeti politikai iskolák részére II. évfolyam
Politics, Popular science
1974
Pictures from the History of Space Exploration (Képek az űrkutatás történetéből I-II.)
Astronautics, Physics, Popular science, Technical history
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