Dan Cosley Jonathan Baxter Soyoung Lee Brian Alson Saeko Nomura Phil Adams Chethan Sarabu Geri Gay A tag in the hand: supporting semantic, social, and spatial navigation in museums. 1953-1962 2009 CHI http://doi.acm.org/10.1145/1518701.1518999 conf/chi/2009 db/conf/chi/chi2009.html#CosleyBLANASG09