Wallace, Edward S.2017-04-202017-04-2019481948b24801082(OCoLC)52833078https://hdl.handle.net/2144/21447Thesis (Ph.D.)--Boston University, 1948. 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