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All these books are free to read: either they're distributed with a free license, or they're in the public domain.
These books are included in the Directory of Open Access Books. This means that they have been peer-reviewed and are of interest to scholars.
Issues on Risk Analysis for Critical Infrastructure Protection
Vittorio Rosato and Antonio Di Pietro, editors
Medievalism, Popular Culture and Politics in Metal Music
Saguar García Amaranta
Authoritarian Trends and Parliamentary Democracy in Europe
Oliver Rathkolb and Sybille Steinbacher, editors
Didáctica de la geometría para la escuela primaria
Jorge Luis León-González and Robert Barcia-Martínez

