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23/04/2006 3:54 am
no-avatar offline mellomail

Joined: 21/04/2006

Posts: 2

Griffiths Data
Thankyou for providing access to this information. I have found it very helpful - even surprising.
My question concerns how to interpret it.
It appears to me that the data shows the results of 3 surveys taken after 1850. If I am correct, is there some way to know which results relate to which year?
25/04/2006 7:45 am


26/04/2006 5:54 pm