Allen, Bertram Tilton2016-10-312016-10-3119481948b14720942(OCoLC)7864199https://hdl.handle.net/2144/18875Thesis (M.S.)--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