Penfield, Lida Scovil2017-01-122017-01-1219381938b14733523(OCoLC)07872690(OCoLC)ocm07872690https://hdl.handle.net/2144/19917Dissertation (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