@incollection{Martin87,
  author	= {Martin, James R.},
  editor	= {Halliday, Michael A. K. and Fawcett, Robin P.},
  year		= {1987},
  title		= {The meaning of features in systemic linguistics},
  booktitle	= {New Developments in Systemic Linguistics},
  volume	= {1},
  publisher	= {Frances Pinter},
  address	= {London},
  pages		= {14--40}
}