Ron Knight:
   _Tom Smith's  Cricket  Umpiring and Scoring_   will 
  tell you all you need to know. ISBN 0-297-64604-4
  If mail-order from England is your best bet, check out 
  http://www.acumenbooks.co.uk/

Ian T: 
   This is the ONLY book recognised by the ACU&S. As 
   such, it is not only 'the bible' but the textbook on 
   the subject. The ISBN number probably changes with each 
   new edition - yearly ?

Alan R Tuffery:
  The following little book [is also] useful.
  There is a webpage about  I'll try to find the URL.
   Hibbs, Derek, (1994). Cricket Scoring, A Handbook 
  for Scorers in Club Cricket. From the author, 1 
  Cleevelands Avenue, Cheltenham GL50 4PY (lbs 2.95
  + 0.30 p&p in UK)

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