http://eprints.comp.lancs.ac.uk/634/ Grammatical word class variation within the British National Corpus sampler Rayson, P. Wilson, A. Leech, G. QA75 Electronic computers. Computer science Rodopi Peters, P. Collins, P. Smith, A. 2002-08 Book Section PeerReviewed http://www.comp.lancs.ac.uk/computing/users/paul/publications/rwl_lc36_2002.pdf Rayson, P. and Wilson, A. and Leech, G. (2002) Grammatical word class variation within the British National Corpus sampler. In: New frontiers of corpus research: Papers from the Twenty First International Conference on English Language Research on Computerized Corpora, Sydney 2000. Rodopi , Amsterdam, pp. 295-306. ISBN 90-420-1237-4 http://eprints.comp.lancs.ac.uk/634/