McMaster University recently provides free access to pdf-versions of its dissertationsthrough the Digital commons of McMaster University, http://digitalcommons.mcmaster.ca/ among the others, here there are PhD thesis of two famous ammonitologists:
Hall R.L. Lower Bajocian (Jurassic) ammonoid faunas of the Western Americas. PhD Thesis, McMaster University. 1976. 239 pp. [unpubl.]
pdf: http://digitalcommons.mcmaster.ca/cgi....tations
Smith P.L. Biostratigraphy and ammonoid fauna of the Lower Jurassic (Sinemurian, Pliensbachian and Lowest Toarcian) of Eastern Oregon and Western Nevada. PhD Thesis, McMaster University. 1981. 368 pp. [unpubl.]
pdf: http://digitalcommons.mcmaster.ca/cgi....tations
unfortunately quality of scanning greyscale images is extremely poor and ammonites cannot be determined by using these PhD Theses