Just a short supporting comment for Bill: at least in archaeology it's 
good and common practice to say what kind of software you have been using 
for your work. This should not always have to be in the form of a 
quotation (you wouldn't want everyone to read the GRASS manuals, for 
instance), but in the case of contributed code it seems no more than 
reasonable to name the authors, either by quotation or by acknowledgement.

Philip Verhagen
-- 


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