Johngren, Alton E.2016-10-202016-10-2019481948b14671591(OCoLC)07817445(OCoLC)ocm07817445https://hdl.handle.net/2144/18360Thesis (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