Steiger, Henry W.2016-11-222016-11-2219461946b14727547(OCoLC)7868420https://hdl.handle.net/2144/19319Dissertation (Ph.D.)--Boston University, 1946. 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