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| 003 | ES-SlBCS | ||
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| 008 | 140520s1954 xxu||||| |||| 00| 0 spa d | ||
| 041 | _aspa | ||
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_aRoberty, Eugène de _9185227 |
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_aLe concept sociologique du Progrès _cEugène de Roberty |
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_aProgreso-Evolución _9330064 |
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_tProgreso y evolución / Antonio Birlan _dBuenos Aires : Americalee, 1954 _g, págs. 118-119 _wVA43556 |
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