Kepler, Thomas S.2017-01-122017-01-1219311931b14756602(OCoLC)07898617(OCoLC)ocm07898617https://hdl.handle.net/2144/19911Dissertation (Ph.D.)--Boston University, 1931. 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