Gasch, Jessie Henrietta2017-04-202017-04-2019351935b14720966(OCoLC)7864202https://hdl.handle.net/2144/21368Thesis (M.S.)--Boston University, 1935. 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