Powers, Harold W.2014-12-152014-12-1519491949b14749774https://archive.org/details/educationalvocat00powehttps://hdl.handle.net/2144/10138Thesis (M.A.)--Boston University This item was digitized by the Internet Archive.en-USBased on investigation of the BU Libraries' staff, this work is free of known copyright restrictions.Thesis/Dissertation