@INPROCEEDINGS{HawkingT95,
    BOOKTITLE	= {Proceedings of {TREC}-4},
    MONTH 	= {November},
    YEAR 	= {1995},
    AUTHOR 	= {David Hawking and Paul Thistlewaite},
    TITLE 	= {Proximity Operators - So Near And Yet So Far},
    PAGES 	= {131--143},
    annote = {Source in /home/dave_data/cheques_local/dave/Papers_Old/Published/TREC4},
    NOTE	=  {NIST special publication 500-236. 
              \url{https://david-hawking.net/pubs/HawkingT95.pdf}, and 
              \url{trec.nist.gov/pubs/trec4/t4_proceedings.html}},
}