Engelbrecht, Arthur Frederick2016-10-202016-10-2019481948b14791584(OCoLC)07966751(OCoLC)ocm07966751https://hdl.handle.net/2144/18535Thesis (M.A.)--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