Hello,

I'm trying to find (to no avail):
"Proof Techniques in Graph Theory" (F. Harary Ed.), Academic Press, New York (1969).

Hope someone could help me.

Have you tried your Uni library? If they don't have it they might be affiliated with other Unis and can help you apply for a an inter-library loan.

amazon.co.uk appears to have 3 of them in Used condition.

G'luck.