Calvin E. Mackey Papers on DiSC'04 User Evaluation of the NASA Technical Report Server Recommendation Service Publications Note: Links lead to the DBLP on the Web. Calvin E. Mackey Michael L. Nelson , JoAnne R. Calhoun , Calvin E. Mackey: The OAI-PMH NASA technical report server. JCDL 2004 : 400 Michael L. Nelson , Johan Bollen , JoAnne R. Calhoun , Calvin E. Mackey: User evaluation of the NASA technical report server recommendation service. WIDM 2004 : 144-151 1 [ 1 ] 2 [ 1 ] [ 2 ] 3 [ 1 ] [ 2 ] ©2005 Association for Computing Machinery