ΗΛΕΚΤΡΟΝΙΚΑ ΠΕΡΙΟΔΙΚΑ ΕΛΕΥΘΕΡΗΣ ΠΡΟΣΒΑΣΗΣ

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 Τίτλος περιοδικούΕκδότης
OBG ManagementDowden Health Media Inc
Observatorio Social de America LatinaCLACSO - Consejo Latinoamericano de Ciencias Sociales
Occupational and environmental medicineBMJ Publishing Group
Occupational medicineOxford University Press
Ocean Science Discussions (OSD)Copernicus Gesellschaft GMBH
Ocean Science (OS)Copernicus Gesellschaft GMBH
OceanologiaForeign Trade Enterprise Ars Polona
OceanusWoods Hole Oceanographic Institution
Odontologia Clinica-CientificaUnspecified
Ohio HistoryOhio Historical Society
Oil and Gas BusinessOil and Gas Business Journal