Prowell, Elizabeth Mae2016-10-312016-10-3119471947b14643923(OCoLC)07792972(OCoLC)ocm07792972https://hdl.handle.net/2144/18886Thesis (M.S.)--Boston University, 1947. This item was digitized by the Internet Archive.en-USBased on investigation of the BU Libraries' staff, this work is free of known copyright restrictionsThesis/Dissertation