Mahoney, Olive G.2016-10-202016-10-2019381938b1474014x(OCoLC)07879106(OCoLC)ocm07879106https://hdl.handle.net/2144/18380Thesis (M.A.)--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 restrictionsExtending first grade experience in numberThesis/Dissertation