@techreport{Collins73,
  author	= {Collins, A. M. and Passafiume, J. and Gould, L. and Carbonell, J. G.},
  month		= aug,
  year		= {1973},
  title		= {Improving Interactive Capabilities in Computer-Assisted Instruction},
  number	= {2631},
  institution	= {Bolt Beranek and Newman, Inc.}
}