Unni Ravindranathan Rao Shen Marcos André Gonçalves Weiguo Fan Edward A. Fox James W. Flanagan ETANA-DL: a digital library for integrated handling of heterogeneous archaeological data. 76-77 2004 conf/jcdl/2004 JCDL http://doi.acm.org/10.1145/996350.996370 db/conf/jcdl/jcdl2004.html#RavindranathanSGFFF04