Steve Dakin wrote:
Does anyone know off hand what year the prefix for
Pitcairn Island changed from VR6 to VP6? Or, for
that matter, where can I find general reference material
for questions of this sort. (eg. old dx callbooks).

http://www.ng3k.com/Dxnl/dxnl1093.html
Google - your best friend

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Pawe³ Stobiñski, SQ9NRY