Ensley, Francis Gerald2016-11-222016-11-2219381938b1473266x(OCoLC)07872317(OCoLC)ocm07872317https://hdl.handle.net/2144/19309Dissertation (Ph.D.)--Boston University, 1938. 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