Gilbert, Alma Louise2016-08-052016-08-0519491949b14805467(OCoLC)07999670(OCoLC)ocm07999670https://hdl.handle.net/2144/17358Thesis (M.S.)--Boston University, 1949. 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