If access is necessary and desired here is another source for the Ehlers pdf, a work which I
believe qualifies as in public domain worldwide.
On 21 Mar 2012 at 11:20, Geoff Read wrote:
> Okay folks,
>> Thanks! It seems to be just the Google system being conservative and limiting open access to the lucky USA constituency (where it knows exactly the copyright rules) for a book that it hasn't good information on. I'm sure Ehlers 1901 is out of copyright in NZ (50 years post author's death).