Pelagic Seabird Guide

["Tom and Mandy Wilson" <>]

Hi all
can somebody please let me know if there is any difference between the 2 
versions of "Albatrosses, Petrels and Shearwaters of the World" by Onley and 
Scofield, published last year.  Searching through a couple of on-line book 
shops yielded what appear to be similar versions published by Helm & 
Princeton respectively.  Both are paperback but the prices seemed to vary, 
so I wondered what the cause was.
I know there was some discussion on the new guide a while back, but I can't 
access the archives to see if it was relevant.
Thanks
Tom Wilson 

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