Butler, Elizabeth Leona2014-01-142014-01-1419301930b14713755https://hdl.handle.net/2144/7152This item was digitized by the Internet Archive. Thesis (Ed.M.)--Boston Universityen-USBased on investigation of the BU Libraries' staff, this work is free of known copyright restrictionsControl experiment in the improvement of business letter essentialsThesis/Dissertation