There are two copies at Alibris

http://www.alibris.com/search/detail.cfm?chunk=25&qat=Biosystematics%20of%20American%20Crows&S=R&bid=3b04f2836bd&page=1&matches=2&qsort=

David Beaudette wrote:
>
> Greetings All,
> Thanks Gene for bringing the title of that work by David W. Johnston to our
> attention. Does anyone know how to get,borrow, or maybe even steal a copy?
> Good Birding,
> Dave Beaudette
> Shoreline
> drtbrdr at earthlink.net
>

--
Mike Patterson Alas, to wear the mantle of Galileo,
Astoria, OR it is not enough to be persecuted
celata at pacifier.com by an unkind establishment,
you must also be right.
---Robert Park
http://www.pacifier.com/~mpatters/bird/bird.html