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We determined the electrical sheet conductivity of silver nanowire-graphene hybrid films from transmission and reflection terahertz time-domain spectroscopy measurements. The sheet resistance extracted from noncontact terahertz measurement is in good agreement with one measured with a classical 4-point-probe technique. The conductivity is well described by a Drude-Smith model and is calculated to peak around 10 THz. (C) 2014 AIP Publishing LLC. Acknowledgments: This work was supported by the European Community in MITEPHO (MIcrowave and TErahertz PHOtonics) project (238393 ITN-FP7). We also acknowledge the Human Resources Development program (No. 20124010203270) of the KETEP grant funded by the Korean government Ministry of Knowledge Economy.