Should you find a dissertation in the database that is not availabe as full-text, you can request it through WMU Libraries' Interlibrary Loan service. Many U.S. colleges and universities their theses, so it's worth requesting them.
WMU doctoral dissertations are all available, full-text, in the Dissertations & Theses Global (ProQuest) database linked above.
You can also search for WMU dissertations in WMU Libraries' Library Search
Search tip: Use the ADVANCED SEARCH feature in Library Search, search using all of these search terms:
