These maps are from Heart, F., McKenzie, A., McQuillian, J., and Walden, D., ARPANET Completion Report, Bolt, Beranek and Newman, Burlington, MA, January 4, 1978.
Folks -- I just scanned these in. They are too big, but right now I do not have the time to reduce them and try filtering out the noise. If someone does, please let me know.